Spliff Politics
Bluelighter
Not sure if its still on there, but a while ago there was some actual R-isomer stuff available on certain dingy-websites. A true ket enthusiast would buy this along with some certified S-Isomer and try to come up with the best ratio of isomers to use. Would do it myself, but ive got a shit load of sewing that needs to be done, so just dont have the time.