I have that one too!
This is Brian Carotenuto, I have in my diecast collection, both the Brilliant Black and the Silver "C"'s manufactured by Maisto. I had contacted them not too long ago about seeing one done in my color. (I have a CV base model).
I was always impressed by the detailing of the Maisto offerings. One thing that I don't like about the "C"'s is that the engine cover is grey instead of black. I recently received a catalog from another diecast car company with an offering of a 300C in black with four opening doors. I am planning on obtaining that model when I return from vacation in a few weeks.
I'll give you the information on the new 300C 1:18 scale if you are interested.
Brian T. Carotenuto