Automilan Owners Club

It appears that Automilan kits were provided with unbranded brake servo and master cylinder - at least mine is. Only info I have is 13/16 on master cylinder. Servo is max 200mm OD. Does anyone have info on the servo and/or the master cylinder so that I can establish what repair kit is suitable or what can be used to replace the items?

Appears an Audi A4 servo may be suitable since OD is 7" or 8" - awaiting more info to confirm or otherwise. Also appears the Automilan servo may be TRW but not yet able to identify master cylinder brand or manufacturer.