Ya' know, I was ALL ready to do the backup camera thang, and I was gonna spend some serious coin on it too. Having had one of these in my RV, I thought I'd try it first in the VX:
http://www.amazon.com/CIPA-60200-Wid.../dp/B000TCI7K4
For the record, I installed it "uncut", at the very bottom and center of the rear window. After you get "used" to it, I've found that it works GREAT - to the point of me no longer feeling the need for a backup camera. Might wanna try it first; you'll save yourself a few beans, and have one less thing on your VX to break!