I just listed these on eBay...
These are my OEM GM Power Extending Camper Tow Mirrors off of my 2005 Silverado 2500HD: Silverado/Sierra Power Extending Tow Mirrors : eBay Motors (item 120563210788 end time May-08-10 18:29:05 PDT)
I also made a video here for you all to see them fully functioning and working, before I had my new '06 Style ones installed, just click on the below image and it will take you to a short video so you can see them on my Duramax:
It's a No Reserve eBay Auction; Free Shipping;$299.00 for the pair; "not just one, both left and right mirrors" and FREE Shipping to the lower 48
From the GM Parts Site: here is what it shows:
Part# 19153378 Mirror assy Right - Camper type, power 2003-2005 MSRP: $724.57 Actual Price: $444.61
Part# 19153377 Mirror assy Left - Camper type, power 2003-2005 MSRP: $703.46 Actual Price: $431.65
These would be at least $900.00 if bought New...