this pistol was made between 1979-89. I suggest that you do a web search under "Air gun repair" and locate a shop near you that can repair the pistol.
Take it to a authorized repair center
Contact the maker for a list of repair centers.
Check the web on "Air Gun Repair" and find a shop near you for repairs.
Best left to a professional, cost might exceed worth of the air weapon.
Try e-gunparts.com
This pistol was made by CZ (Ceska Zbrojovka) They have been making air guns since 1936. The TEX model 3 is also known as the CZ-3. CZ air guns are imported by TOP GUN airguns in Scottsdale AZ. (See the link below) I would contact them and see if they can recommend a repair shop. You can also do a search on the web for "air gun repair" and locate a shop to repair your pistol. This pistol is rated at 400 FPS
Do a search on the web for "Air gun repair" and locate a shop near you to repair the air gun, or See the link below.
This model has been out of production since 1975. I would try a repair shop that specializes in air gun repair. see the link below..
Crosman air gun company owns both the Benjamin and Sheridan line of air gun products. They offer a web page to locate independent repair shops that repair air guns see the link below.http://www.crosman.com/general/find-a-service-center
you can start by searching the web for "Airgun Repair' or see the link below.
Crosman offers a service to locate repair shops the repair older Crosman, Benjamin and Sheridan air guns. See the link below