The name of the person making the RC-12 kit is Vitaliy Repin. He is also developing a conversion kit for the 1/48th scale Trumpeter C-47 to create a Basler BT-67 Turbo Dakota/DC-3/C-47/R4D. The downside is that the conversion is intended for the Trumpeter C-47 kit and I am not sure how it will interface with the Monogram kit.
Images and details can be seen at this link on the Aircraft Resource Center Forums
1/48 Basler BT-67 conversion set for Trumpeter C-47