Welcome Salethefish! Marwan & IlDiver are real good sources and value their advice. I shoot an older carbine style guns. One with single band, the other with double band. I've had to replace the bands several times oover the decades due to dry rot

(I know I've ignored you my beauties but now we're spending quality time

). Anyway...I
COULD make my own bands because I'm quite handy but I'd rather dedicate
TIME to other things. So I buy mine pre-made and the price is very reasonable. Just get your measurements & go to local shop, on-line store, or e-bay to get them.

Make sure your tip is sharp. A large bastard file stroked toward the pointy end will suffice. I stay away from grinders because if you get the tip too hot it will take the temper out of the steel and it's way to easy to get out of round. As sharpening stroke 3 times with the file & turn 1/8 turn...repeat (no comments from Pastor

). Also use silicon spray in the trigger release to insure smooth release.
Best regards & luck hunting, send & trade recipes as you get them.
Chef Al