LarryD was actually the original user for the Bubble display, my cards were from his inspiration. Got to give credit where credit is due! I do like them, they make a nice crisp display.
24 pin?
Should work - current flow is very low, so little voltage loss across the cable.
Make sure the ribbon connectors end up looking like 1:1 extender and not flipped around.
Here's a 24 pin board mount:
HWS5097
NUMBER OF PINS: 24
2x12 IDC DIP PLUG .1"x.6"
(.1"Pin spacing .6"Row spacing)
Attaches directly to PCB
or mates with DIP .1"x.6" socket