No available data on the 727-200C
So far as the FAA is concerned there is no 727-200C at least not that ever carried a type certificate. The 727 series has a common type cert which you can find here and it has no listing of a 727-200C type. There are however 727-100C and a 727C types listed and some other numberings that use the C nomenclature but none that use -200C. The image that @JuanJimenez links from wikipedia is incorrectly labeled. You can see it carries Canadian registration C-GXFA which is a 727-233 you can find more pictures of it here. Also note that the wikipedia section states only one was built and provides no citation at that.  

Interestingly the Smithsonian has a model of one...