Good move Mark!
That is one of the main reasons why I went to the MX5. Cheapish, fun, and its a great platform to learn how to get quicker on the track!
If you get it, you gotta do the sprints first with Ando and myself! Its uber fun!
Have you tried searching on http://www.toymods.net/forums/ for info on these things?
Could even find a few out there for sale!!
We'll chat at Marulan about it on sunday mate