I was ordering some electrical stuff from B&C Specialties tonight, and I stumbled across a Dynon EFIS installation kit that they are selling. It consists of 3 connector housings, D-sub pins and a D-sub crimp tool. Note that the connector shells are not included. The kit can be ordered on their secure order site - it is near the bottom of the Wire Misc page.

As soon as I finished the electrical system order, I got an e-mail announcing that SteinAir was now selling Dynon EFIS installation kits too. You can find the link on their main page. It seems to be more complete than B&C Specialties' kit, and is cheaper too.