by ACourtney » Thu Jul 21, 2016 8:54 pm
I believe that they are the same ones as used on the 1980-89 Mini master cylinder GMC227. The master cylinders themselves are different, but as they are available from Mini Spares, Mini Sport, etc, that means that AP are still making the reservoirs.
Buying a complete Mini master cylinder at around £70 may seem a bit excessive, but might be the easiest option. It would also be feasible to plumb in a remote reservoir, or two, but the cost of that is likely to be around the same as the Mini master cylinder.