Best to stay away from Ebay unless it's a proven seller. In the US see BLF user RMM's store Mountain Electronics (his sales thread here). You could also try ShiningBeam or IlluminationSupply. (I.S. is active on BLF too)
And for help picking your LED tints see this chart of tints.
There is also a BLF thread around here called LED Database or something with links, prices, etc. . . EDIT - Here is that thread.
-Garry