SP will make them any way you want them as they are essentially made to order here in the US. You emailed me and I sent you a lot of info - what's up with that? EBC is made in UK but are excellent products. Brembo is hype and very difficult to work with refusing to supply me with rotor rebuild seals ($5 part) but would happily sell me a $5000 replacement set of rotors! Cryo is hype unless you are a competitor but you can send any new rotor to them and they'll treat them.

Rears are seldom replaced so it does not make sense for many companies to tool up for them. Seldom can you see enough of both front and rear rotors especially with stock rims anyway but it is your money.