I bought my RAM mount from Aerostich for $40, and the Garmin Motorcycle kit on eBay, from a guy in Madison, WI. The kit comes with everything to wire directly, and it comes with a cradle that powers the GPS and locks it in place..
I have that whole kit on my V Strom, and just the regular RAM mount on my KLR. The Strom gets the longer rides, so I figured I'd mount it on that bike, since the battery in my Quest is good for 18+ hours.
Also, did you make it up to the new Cabela's this weekend? I'm flying out of Milwaukee tomorrow and I'll be back on Thursday afternoon. I figure I'll bounce up to Richfield on my way home.