The TM-7 Players Replacement Parts Kit from BT has all the spare replacement parts you'll need for your TM series marker.

Features
Ball Detent Springs and Assemblies
Selector, Grip, Frame, and Trigger Set Screws
Trigger Springs and Activation Set Screws
Poppets Seals and Poppet Spring
Bolt Rubber Tips and Guide Cap O-Rings
Regulator Adjustment Screws
Check Valve and Selector Arms
Shell, Screws and Hex Nuts