996 rear disc brake problems!!

[marco the T.S.E]

im looking for some advice,
i have got 996 rear brakes discs and calipers on all 4 corners of my bug, there all identical
Iv used them, as i have them , but now im wondering what m/c should i use ?
as if i use a bugT1 m/c i dont think it will have enough fluid to fill all the brakes and problely have too much travel,
i dont mind using a proportioning valve but what m/c???
thanks
Marco the Turbo Steam Engine.