Jantz Supply has what you are looking for
http://www.knifemaking.com/category-... how=10&page=2

Been grinding with a belt for 25 years and you really don't need
beyond 240 grit, use a worn one for the final hone, or charge a very
worn one with polishing compound to hone. Have yet to see a 30" belt
sander that woud take leather stropping belt there just isn't room.