I dont have a black cd unit to compare at the moment but I have a TG16 & cd dock (minus the cd unit), and I was thinking of getting a working white cd unit (since they seem more available) and putting the black housing on it from a broken drive so it's all black and original looking.
If the only difference is the power plug/interface plug in the back, that doesnt seem like a big deal.
Anyone else know for sure?