Today I ordered 2 connector kits for the Garmin GSA 28 servos and one of the GMU 11 magnetometer install kit here.  The GMU 11 Install Kit is number 11-15066 and the GSA 28 kit is number 11-12171.

The magnetometer kit can be hard to find if you just search for it, so the above is the only way to get to the right place to order it.