I followed 'BonitaCobra's link to Covercraft, and found their overstock sale page
http://www.covercraft.com/cover_sale.htm
I ordered two of the smallest size, and paid the $8 for two day shipping (they offer ground shipping for free).
They arrived about a half hour ago, and for $18.99, it is a pretty nice cover for indoor storage. It's about a foot longer than it needs to be, but the width is about right for a 427 body, and the height is just about right. A little tall for my car with no roll bar. It hangs just barely lower than the body, no worry about it touching the floor. The height would fit fine on a car with a bar (or two).
The cover is thick enough to prevent any of the typical garage storage mishaps, yet packs to a pretty compact package (maybe 16"x12"x12")
The other one I ordered is going on a modified VW Corrado which spends most of it's life in the corner of my garage (need to wash the dust off before i try the fit on it).
Quite a pleasant surprise for the money.