Managed to work out the pinout on some salvaged LED displays. Slightly odd ones, two normal 7 segment digits, one that’s a 2 segment but both segments are wired together and can’t be used separately. So they can display 0 – 199.
I actually need 3 digits to cover all the common dice ranges for Dungeons and Dragons(various even numbers from 4 through 100), so one of these will prove very nice and I might try to source more rather than use full 3 digit displays. I also need a regular 2 digit display for the same project, my second one of these should work well enough for prototyping.