Going back on what white_sandshoes said in SA they have whats called an excel rally, which just means people get an roadwaorthy and licensed excel install a rollcage take out seats and what ever then race, no engine mods, the idea is you spend $5,000 on car, rollcage, fire extingishure and membership and you have yourself a race car. It would be good to get an event like this in perth. There is a website for the event I will see if I can find it.....
EDIT:
The site is, belive it or not, www.excelrally.com.au. Its a forum and they have Queensland, Victoria, Tassy and almost anywahere else but WA, Maybe we could get a WA series. If anyone is interested we could get a few people from different forums who are interested, there must be at least a few people.
Edit 2:
Found this in the quokka Hyundai Excel LS 1992. 128000km. Regularly serviced, no rust. Lady owner. $1000 ono. It could be heaps cheaper to use excels, it would eliminate arguments as no one would wont to admit ownership and have it at the house :P