Can't you just order from their site? That's what I did with the supertone bridges.
Yes, you can. But they sell at full retail list, so that they don't undercut stores who buy wholesale from them. But there are online sources (and some local stores) who sell at a discount off list. Like John Wymore.
Same thing is true of Allparts. The bulk of their business is wholesale. They'll be glad to sell to you at full retail, but they're not about to undercut their own store accounts by discounting.