In particular, the MRA42P solder cup 42 pin
"winchester" plug for
Diablo 31 disk drives.
Manufacturer's webpage lists Powell and CDM as stocking distributors.
http://dilp.netcomponents.com/winchesterelectronics.html
Does the CHM or someone local to you have a RK03? Some mid-late-70's
early DEC and DG 3rd-party sellers (AED? DSD? General Robotics?) sold Diablo
drives with their own homegrown Unibus and Omnibus interfaces but that
stuff was kinda crufty when it brand new, never mind 30+ years later. Wasn't
the Diablo 30 the same as the RK03?
Tim.