Dont know if it will fit, but I can think of another issue.
Novatouch domes are solid grey, while Noppoo/RK domes are translucent, so the led light can shine through. The same about the housing, you would need the RK translucent housing for the leds. In the end, there wouldnt be much "real" topre on the mix.
On a side note, topre seems to be releasing a backlit rgb board soon™. At least they showed a RGB type heaven on last computex, so maybe you should just wait a little.