Well here's what I did .... I take 2 well washed and old king sized sheets (cotton), and cover the car with them first, then I cover them with a medium priced cover from Wally world. I may not have the "dust" problem like you, but it served me very well. When removing it, a simple brush up with the California duster, and then Detailer/microfiber toweling.

As far as a crossfire bra? I bought one about 2 mos ago off of ebay ..... @ $150 shipped from a Chrysler Dealer (?) in Michigan. Original Chrysler OEM ..... the only way to go! Fit is PERFECT.. no wrinkles, no slack areas that can abrate. Make sure you get one for your model (limited. SRT, etc) and whether you want the front license cutout, or not. Search ebay (there are other dealers selling there also)......put in "Crossfire bumper cover" to search ..... I probably could look up the name of the dealer if you want ..... just PM me.