The master cylinders shown in those links with the aluminum body and black plastic reservoirs are actually OE Mopar units and can be found in a variety of configurations and bore sizes including 7/8", 15/16" [24mm], 1.06", etc. They were supplied on numerous Dodge/Plymouth/Chrysler applications from the early 80's through the 90's IIRC.
The ones i've seen offered with the firewall adapter were 1.06 or bigger.
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
Threaded Mode