I buy mine on eBay, cheaper than I could ever sell them.
Check eBay 151921708354 for these. These are from a US seller, so you should get them in at most a few days. I just use CA adhesive to stick them where I need them and wire them with #30 wire.
Ultra Warm White 5050 SMD LED PLCC-6 3-Chip SMT 50pcs