FWIW I tried these folks last time I ordered belts.
https://www.combatabrasives.com/store/
I believe their prices are pretty good. They MAKE THEM TO ORDER right here in the good ole USA. This DID cause a delay which I questioned via email. The guy called me three days in a row until he finally got me on the phone. He apologized profusely and explained that some of the finer grits they make to order and usually ship within 3 days but they had a material delay. They heavier belts they keep in stock. He was genuinely concerned for my business. Good customer relations is important and I'll order from them again because of that phone call.
I would rate their 60 grit ceramic slightly ahead of TruGrits economy 60 grit ceramic. Seems I easily get two blades out of each and sometimes with a smaller blade I can get 3. I use them then to profile a few, then to hog out wood initially when shaping a handle or scales. Then I reluctantly throw them out.
"...treat belts like they were free."
I'm not there yet. Because they're NOT free, in fact, they're darn expensive. I try to get all the mileage I can out of them. Yes, without a doubt grinding goes faster and smoother with a new belt. Maybe false economy when added time is factored in. Dunno. As yet, I haven't ruined anything as a result but I do on occasion realize how long it's taking to grind a bevel and then change it for a new belt.