Justin I pretty much just check who has the best prices most of the time and inexpensive shipping. For some supplies I use Jantz supply. In OK. Beware of very good price and very high shipping. Some suppliers of especially metals are like that, these two are not. Jantz has some exotics handle materials too like zebra bone or Eland horn.
http://www.knifemaking.com/
Near where you live you would be hard pressed to find cheaper than Sheffield knifemakers supply in Orange City Fl. as well.
http://www.sheffieldsupply.com/SUPPLYCAT.pdf They do not have online shopping, you have to call them the link is to their catalog. They use the USPS which is the cheapest for shipping for smaller stuff.
Also for sanding belts you can't beat TruGrit.com Justin. They sell some brass under steels as well.