tpollauf wrote:Hmmmmm .... Somebody must need it as bad as you do. I take it these covers are to keep the mirrors clean of ice/snow during winter driving only? I'm going to sew up some covers to slip over the mirror and do the same thing. I'd be curious as to what these even look like. That price seems ridiculous

Apply some "high voltage" to the next cover and listen for the scream

I believe the OP is referring to the color matched part of the side mirrors.
That definitely sucks. I can't imagine it just falling off on its own, but then again, who knows...?
GMPartsCenter.net shows the part number you listed for $60.06. They charge $8.95 handling, shipping is free and they are currently offering 5% off orders over $50.00 using coupon code
NOV5 for a grand total of approximately $70.00.
You could also check out
car-part.com to see if by chance there are any Vibes in a junkyard near you.
A Matrix one should be the same exact thing, but the paint color may not match since the Matrix and Vibe had different exterior colors.