Back when the movie came out and you could find stuff in stores, I remember they had a 1:28 scale replica of the car and it came with a figurine of Brian. Revell made the kit if I am not mistaken. You may be able to find one of those kits on Ebay.
Here is a link to the set that I am talking about
:
http://ecx.images-amazon.com/images/...NL._SL160_.jpg. Hope that helps you out some.