Based on squinting at their respective analogue boards, I suspect there's a lot of overlap between the Colour Classic AB and a 9" Sony PVM.I may have a suggestion,….. to have a look/search for small trinitron monitors wich may fit your purpose.
Had a quick search on ebay and showed two 8 inches. (Could be 9” build format, like with the other compact Macs)
I do have a CC with some very scorched Zener diodes on the AB that I could probably try reversing, but analogue stuff is not my specialty.