Who makes an Aluminum master cylinder for 70 dart front manual disc brakes

Dr Diff sells an adapter plate + MC for ~$95. Has been linked several times in the last 2 months if you search. He recently chimed in that his are specially made w/ a smaller bore (7/8"D?) than the similar-looking 1980's Dodge truck MC. Or, for $30 you can buy an adapter plate on ebay from several sellers and use almost any 2-bolt aluminum MC. I use one for a 95-99 Breeze/Cirrus/Sratus w/ ABS (7/8" bore) on my 3 1960's Mopars [two via adapter plates, one on a Breeze booster (see avatar)].