And another good place for belts is Combat Abrasives
https://www.combatabrasives.com/store/
They have some pretty good prices on their "shredder" belts, 60 grit ceramics. You may need to buy a dozen or more but they work pretty good and hold up well. I can usually get 2-3 blades roughed in out of each one. Afterwards, I use it for cleaning up profiles after cutting out a blade, or rough shaping scales after epoxy. I use 'em up.
And +1 on Tru-Grit