Six or seven years ago you wouldn't even have had to ask; there were NeXT-looking themes aplenty back then. I haven't seen one in ages though. But... if you want to get into LS theming this is a golden opportunity. You know what you're after and the modules are there to make it happen (if the old wharf.dll works with the new builds, that is), and I'm sure you can find some NeXT graphics somewhere. Why don't you give it a shot? :)