Well basically, my brakes have failed in mine - check list that has past are - calipers, hoses, lines, air locks, etc. and the booster but ultimately it has come down to an internal leak within the Master due to pedal going to floor and is really soft.
have also spoken to mechanic's as well with the same conclusion being the front piston seal has given way...
I don't think they are available new? But i haven't been given the chance to call round due to work + Funds are not the brightest at the moment either...