I finally got around to installing an extra PRO 2055 I got off E-Bay for $70 into my truck. It was cheap because it didn't have a wall AC adapter, or stock antenna. I used the DC cord and bracket from another PRO 2055 I purchased for home use, and a glass-mount antenna from E-Bay also. So far it works well, I will let everyone know how the glass mount works. Here are the pictures from the install I did today.
Inside Large View:
Inside Close-Up:
Outside Antenna Shot:
Inside Large View:
Inside Close-Up:
Outside Antenna Shot: