try any local golf pro store…they normally have every length etc. Surprisingly Dicks’s Sports has a good selection as well!
For everything on par 3s just push the ground use 15 tees have no.
The tee little farther into the tee little farther into the tee little farther into the tee little farther into the tee little farther into the ground use 15 tees too and use them for everything on par.