I was just kidding about radium. It's damaging to your health (just as radioactive as its name suggests), or rather the workers who applied it to the dials, so watch manufacturers stopped using it long ago. Does look super cool though, trapped safely under glass, if you find an old watch with it.
For KBT Race, I'd look at
Qtan's store and
KBT's European importer's site. The Race sounds like the closest thing to what you're after: 75% and backlit.
When I
first arrived here, I was after backlights and Bluetooth too! I've soured on backlights since I found out about the limitations with their key caps. Backlit boards all use lasered ABS. The caps are thin and cut so the light can shine through the legends. That makes them pretty bad for wear, so they get the other kind of "shine" faster than PBT; and that kind of wear looks bad on lasered caps compared to double shots. I'd prefer to put quality caps on a backlit board and live with "glowing" keys rather than "shining" ones.
As for Bluetooth: there is only one Bluetooth mechanical keyboard I have ever heard of, and believe me I've asked! It's the
Majestouch Wireless. Full size only, and only sold in Japan. Bluetooth's taking its sweet time to come to good keyboards. You'd think it would be faster, with iPads and Bluetooth equipped TVs and such, but progress here is slow.
Filco's put a USB hub in the little
Minila. And the Topre keyswitch (and therefore expensive)
HHKB has one too. Oddly enough, hubs seem to be a small keyboard feature, but even then quite rare. I don't get it!
So you like your Model Ms? Sweet. I just picked up a Model F the other day, the first keyboard of mine with a fantastic switch. It's from 1985 so I'm having to
make a converter, but thankfully other people have been there and done that before me, so it should be pretty smooth going. Buckling spring is something else!