The Data I/O groups
https://groups.io/g/DataioEPROM the user Mike DiBattista created a modern windows control software called PL2260+ for these 40 year old programmers a lot of support for other data I/O Programmers as well.
Connects and Was Able to Read and verify a Couple Random TMS2716's
If there is anyone good at 3D Modeling and has a Unipack 2B could use a 3D Model of the Removable Adapter housing.