I bought a set of Husky 57341 a few years back, as I wanted 'custom moulded', but didn't want 'GMC' lettering on them (although I'd love to have one of the hitch mount covers with 'GMC' on it - call me crazy). They're still in the box; I'll put them on someday (when I run across them again).
Here's a pic of what they look like:
The matching fronts, if you're interested, are 5
6341