Went to my local AT&T store and asked if they have both docks for the infuse. The guy grabbed them, and I told him that my friend got a special bundle by having the guy scan the car dock first, then the home dock. The AT&T guy was cool and scanned it that way and told me the total. (Under $20 with tax) When he asked for my number, I told him it's not AT&T, so he said no problem. (Really only needed for warranty purposes, if you lose your receipt, don't expect to take advantage of the one year warranty.)
No hassle. The guy was more surprised that they were offering the bundle, so obviously there's no communication from corporate on it.
Bonus: when I got home, I opened the car dock and there was a free car charger sitting in the box. I have plenty of car chargers, but it was nice to get $95 worth of accessories for only $20. Now the problem is finding a flat spot on my dash that would be good to mount it to (not putting it on the windshield since it is so far away.)
Thanks to those that found and posted this deal. Now I gotta look into profiles and making the phone do what I want when it is docked (and different when I dock it at home at night.)