Recommended RAM bits for mounting a Garmin GPS on a migsel GPS mount:

Garmin ZUMO
ALL the necessary RAM bits are in the Zumo package!

Garmin StreetPilot 2610/2710/2820
* RAM short arm (RAM-B-201-A)
* RAM diamond base  (RAM-B-238)
* RAM 2610 Cradle (RAM-HOL-GA9)
* 2610 power / audio cable (Garmin 010-10495-02)

Garmin Quest (and Quest 2)
* RAM short arm (RAM-B-201-A)
* RAM diamond base  (RAM-B-238)
* RAM Quest Cradle (RAM-HOL-GA15)
* RAM Quest Power & Audio Cable (QPAC)  -  several versions

Garmin 276C
* RAM short arm (RAM-B-201-A)
* 2 1/2" Diameter Base with 1" Ball  (RAM-B-202)
* half of your Garmin marine mount
* power / audio cable

Garmin StreetPilot III
* RAM short arm (RAM-B-201-A)
* 2 1/2" Diameter Base with 1" Ball  (RAM-B-202)
* your Garmin car cradle
* power cable

TomTom Rider
* RAM short arm (RAM-B-201-A)
* RAM diamond base  (RAM-B-238) fits diagonally across the rear face of TT cradle


Online sources for these parts:

RAM (USA)

The GPS Warehouse (UK)

Multitudo (BE)

Point2 (BE)

Waypoint (NL)