so.. went to Bunnings and bought a discounted Gerni (?) pressure cleaner for $30.. the reason that it was discounted was because it was it was open and some parts missing, and it was sitting around for ages... then some dude came out and said 'i know where some parts are for that thing'. Walks away - 5 mins later - gave me a basket of random parts and says, 'some of those will fit' - walks away.
I'll post up results.. can't wait to see if the foam lance works.. I'm gonna foam the sh!t out of my car.