I have been involved with VERY high end "pepper mixes" they burn badly and can kill..its doubtful if you will ever see truly high end pepper mixes sold over the counter.
Back in the 1930s the top dog of "sprays" was DM/vomit gas in .410ga and 20ga tear gas pens...it worked great but could kill so it faded away from use....and was gone from over the counter sales by the 1940s.
Here is a bit of "pepper info".
High end "pepper" can be a very bad deal as far as it causes burns and can damage tissue ! and IMO is dangerous...I have a friend that collects ultra exotic "hot sauce mixtures" and 1 of them he had was in a pure crystal form of capsaicin....I had looked at it many times at his home and thought what can I do with this.... I started to look into mfg a limited sale "last gasp" type capsaicin spray.Capsaicin is freely soluble in ether and chloroform....oh sorry thats another story...
The Pure N-Vanillyl-8-methyl-6-(E)-noneamide Crystal was rated at 16,000,000 Scoville Heat Units.......
I have worked on a my "last gasp" pepper spray idea for a few years,on and off.
I had a few mixes that were tested by a partner and myself...I shut down my own breathing down so far and had such a bad panic effect,I had to have my emt pal who was on standby just in case....help me to recover...IT WAS VERY DANGEROUS & SCARY !!!!!
IMO-KILLER pepper gas would be to dangerous for general sale...for a few reasons.
1 is blow back and it always happens in some form no matter what.
The other is unless person is very healthy it can shut OFF breathing.
3rd burns to the mucosa and other problems.
Here is the rateing of heat units for the Capsaicinoid family
8,600,000 Scoville Units is Homocapsaicin.
8,600,000 Scoville Units is Homodihydrocapsaicin.
9,100,000 Scoville Units is Nordihydrocapsaicin.
16,000,000 Scoville Units is Dihydrocapsaicin.
16,000,000 Scoville Units is Pure Capsaicin
What does this all mean...well Sabre Red is one of the hottest sprays at 10% and a true SHU of about 250,000 ...now re-think the 8-16,000,000 SHU....You would not get this high a shu out of the nozzle but it would make all current OC sprays look like mild sauce at taco bell.
A general way to check OC is If the product claims 15% OC at 2,000,000 SHU, you multiply the claimed SHU by the claimed percentage of OC. i.e.: 2,000,000 SHU X 15% (or .15) = 300,000 "true" SHU. Lots of BS numbers out their.
BE VERY,VERY CAREFUL , ITS NOT GOING TO BE FOX LABS or SABRE RED....IF you GET IT RIGHT.
Very simple home brew starting point...
Puree 50 Habanero's in pure/200 proof Ethanol ...190 proof everclear will work. Let the mixture sit overnight at room temperature. Filter the sludge through coffe filters and place the liquid in a glass container. Begin to heat the liquid very slowly using either an electric heating device (naked flames would be dangerous), or use a vapour trap to remove the alcohol fumes safely. Continue until 90% of the liquid has evaporated. Remove from the heat and let cool.
Look for a brick-red oil floating on the surface of the ethanol. If none is present, continue to evaporate the ethanol away periodically cooling the mixture to look for the red oil on the surface.
Once the red oil appears, pour the red oil and the remaining ethanol into a long thin glass cylinder, use an eye dropper to suck off the oil and place it in a clean container.
The oil is SEMI pure Capsaicin, in the range of 40% Capsaicin / 60% Capsaicinoids.
Fill pressure delivery device of your choice with solvent and oil.
Please ...UNDERSTAND that Capsaicin is an extreme irritant and CAN BE hazardous to your health as both a chemical burn agent and as a poison when in its purer concentrated forms. Only a fool or a person with some general training as a chemist would want to undertake the above procedure....USE CAUTION !