... I can't even get my service to replace supplies that I use. Not that I would want their old, cheap, yellowed, crap. But I supply all of my own supplies. Though, I usually don't have a problem replacing supplies of those providing Initial care. May even trade a full O2 cylinder for an empty one, give if it's in date and not defective.

(For Kits and Disposables)
I find Pro Med to be the cheapest, but best quality.
http://www.progressivemed.com/

(for burn/IV solutions)
This one doesn't require a physicians order
http://www.bpmedicalsupplies.com/main.sc

Do NOT.. EVER... Buy from First Aid Only. I was spec'ing a kit, as we saw fit. A 50 Unit (b/c 36 Unit isn't enough) self made kit in a 3 shelf industrial box was my target. When I went to add the splint, I noticed that they sell the SAM Splint for $31 over the retail suggested price. In fact, most of their products, are gouged, at twice or more, their mfg.'s suggested value. So, I made a point, to tell them that their severely over priced splint, was the cause of them losing a $300.23 sale.