Here I can only get the powder Tetenal C-41 kit delivered to me. Since it is powder I just mix the whole thing up, giving me 1L developer, 1L blix and 1L stabilizer. It works great! I've developer 24 rolls with it so far since I mixed it in January.
RA-4 I can get liquid from Kodak in 10L dev and blix here in Canada or there is a Tetenal 5L kit that B&H will ship. Kodak has instructions on how to make 1L portions of the RA-4 dev and blix, not sure about Tetenal.