I've seen a couple but they are either too small or the wrong frame.
The MT3 or MT4 based bikes were (I think) the Diabolo (MT3), Quantum (MT3) and Ogre (MT4). All were bonded with Ti main tubes. The MT3 had cro mo rear triangle and the MT4 had Ti chain stays and cro mo seat stays. The MT3 bikes are actually better to ride as they have a stiffer rear triangle, the MT4's are lighter. MT5's had MMC main tubes and are like rocking horse pooh!
I had a Quantum, and would love another, it will turn up!