Yes. The newly pressed cases are the original molds from Commodore for the C64C, and that model C64 can accommodate any C64 mainboard. Since this new Ultimate-64 is compatible with C64 cases, in turn it's also compatible with these newly pressed ones.

You'd also need a keyboard. So...I'm more likely to hit up eBay for a broken complete unit (though I just browsed, and found none with all their keys!). Then again, a red or blue C64 sounds kinda amazing.