fn m24/30 venezuela contract 7x57 need help finding rear sight

Hello to everyone!
Total noob to this site. Please bare with me as I learn the ropes.

I keep this as short as I can. I have been looking for a rear sight for my fn m24/30 Venezuela short rifle 7x57. I looked high and low for this sight and have run out of places to search. Can anyone give me some suggestions where to look or do you know of one for sale!

I have bought two rear sights off ebay from a seller "MartyMauser). He fancies himself as an expert on mausers. Personally I think he is a fraud. Of course both sight bases do not fit and when I questioned him on the sights not fitting He gives me the bs line that I must be mistaken and the rifle I have is not a m24/30. So I send him pics confirming I do indeed have a m24/30. Now He says that One sight was for the m24/30 carbine and the second sight will not fit because I have a military stepped barrel. Double talking

I tried to google barrel specs for all mausers plus even tried to google rear sight base specs. Nothing zippo nadda. You would have thought there would be something somewhere someone who had these specs. Is there a thread here containing such info?

I would like it very much if you would reply with with your mauser model, measurements of the of the od of the barrel where the rear sight sits, barrel length, caliber plus a description of the rear sight. I'll post these specs in a list with your username next to each contribution/s as a thank you and a nod to your collection.