I forgot to update this. So I found the SK-8135, but it was worn as all get out. I mean, half of the keycaps were worn down to oblivion and the board was just nasty. I don't mind a cleanup, but didn't really want to spend the effort to wear down the remaining caps so it'd be blank. Also, no USB pass through like the ones at my work. So, no go. I do keep a couple of rubber domes around, but they aren't Dells, so more about that elsewhere on GH.
I did find a Thailand-made Quietkey though. Much nicer than the other Quietkey I saw a while back. I'll let someone else enjoy that one.