http://www.gadrocsworkshop.com/node/185
Here's a link to the panel counts for the A-10C. Obviously you'll need to add one or more ground lines for some panels, so factor that in to your counts, but 15 pin dsubs should suit most panels, with some larger ones for others. Don't forget it's also possible to connect numerous DSubs to one panel (CDU/UFC) will need this for sure.