The 99 is an easy fix- use the barrel seal and plunger head from the current production Daisy model 25. You can buy these parts directly from Daisy, cost is $2.50 plus shipping.
130225-100 Plunger head 1.50
130126-100 Barrel seal $1.00
If you'd rather have someone else do your 99, anyone who can handle the 1894 can certainly do the 99 at the same time.
Regarding your 1894, it is a complicated 'bit of kit', as the Brits would say. Hopefully someone will have a recommendation for someone who has worked on their 1894, but until then the following is a list supplied by Daisy:
"For parts or repair on the older model guns you will need to contact one of the gunsmiths listed below. We no longer have parts or do repairs on discontinued models. We suggest you contact them prior to shipping your gun for repair charges with shipping and handling."
ETA- Last updated 9-9-15
Qualified Gunsmiths:
Dave Harmsworth 407-816-8863
6521 Matchett Rd
[email protected]
Orlando FL 32809
Ken Hofstra 520-305-3114
Daisy Gun Works
[email protected]
632 North Avenida Tortuga
Green Valley AZ 85614-3459
Douglas Vorenkamp 360-656-5123
Accurate Airguns
[email protected]
Washington State
http://www.accurateairguns.com
Dennis Baker (937) 660-9152
19711 County Road 230
[email protected]
Mt Victory OH 43340
www.airgun-repair.com
Tony McDaniel 704-325-3931
T Macs
967 US 70 Hwy
[email protected]
Newton, NC 28658
Brian Zorc 224-603-2005
1862 E Belvidere Rd Ste 196
http://fixmyairgun.com/
Grayslake IL 60030
[email protected] [email protected]
For Refinishing and Reblueing:
Mr. Jim Dry (918) 341-9104
12322 E. Oak Drive
Claremore, OK 74017