Looks like Joel has all the bases covered.
If you are using a belt grinder or are considering getting one. YOu might consider ENCO. They have the best prices on bulk sanding belts. YOu just need to look around and find the sander at a good price. Some of the mail order places are more expensive and some are cheaper. It just takes a little time to find the right place.
Sheffield does have the best selection of blade material in just about whatever length, width and thickness you need. That's where I get all my annealed blanks.
Have fun,
I am,
HBL