This one looks like it could be fun.

Spaceframe Hillman Imp Hillclimb, Sprint, Race Car on eBay (end time 26-Jan-11 20:12:10 GMT)

Reminds me of the Chevron based "Chimp"

fuel injected gsxr1100wp in a car. Now everyones doing it!

theres a guy near me, races/used to race formula fords, he's got a few spaceframe imps in his workshop, think hes got 4? and one standard shelled one