Although I'm fairly sure I'd come across the 7-on-a-chip below, I re-discovered via Keith B's Lotus and Caterham site, so credit where credit is due.  It's not your usual build site, but as well as the obligatory links, it has some cartoons and other humour.

It also looks like Keith's car is for sale, so if you are interested in a Caterham Seven that has been personally signed by Graham Nearn, get in touch with him.