Just an update, they do now. But it's still a bit pricy at about $70
"It uses a genuine Cree XM-L2 LED. This dropin produces a real 700 (measured out the front) lumens with 3 or 4 NIMH rechargable batteries."
I have two unmolested 3Ds that I'm looking at maybe modding. Would be interested...
I know it's old but I still am using a Dremel mod.750 with a #755 4.8 volt battery pack that has now bit the dust and want to go with NiMH. I see talk of different chargers but I've also seen that people have used the nicad charger after doing a MiMH transplant and it just takes longer to charge...