Art Supply companies that wholesale to offices?

I’m just starting my job as a product/graphic designer for a company and I need to find a good office supply co. which caters to design supplies. Specifically, I want to find one that carries Tria markers and refills, and I’m open to discovering an ad marker that works better then Prismacolors. Any advice is appreciated.

on line art supplies. they have Trias.

IMO Trias are great and worth the expense. they match Pantones and there is no variance between same colors as in Prismacolors (plus they dont stink as bad)

Daniel Smith

Thanks for the suggestions everyone.