These are packed into morphs for easy installing and to theme a few images in framework-res.apk. That is why they are separated into hdpi and mdpi, the actual Vending.apk is the same in both. Tested on a D1 running CM7. The one called WallVending uses your wallpaper as the background, giving it a transparent look without getting too messy.
0. Make a backup, just in case.
1. Goto Manage Applications and uninstall updates on the market.
2. Install using ZipThemer or Metamorph.
The wallpaper used in the WallVending Screenshot: