Holdens have a slightly thicker (possibly wider too) version of the Pursuit/Interceptor steelies for utes, Ford possibly have the same.
Try asking at tyre/mag wheel shops for used ones as customers get shiny new mags and quite often give the old wheels to the shop. Failing that, check the classies in the daily rag or Trading Post. I picked up 4 x 15" steelies with OK tyres for my Falc out of the local paper for $150. Remember that AU wheels don't fit early Falcs unless you have mega buck spacers (there was a thread here about this recently).
You know, somebody actually complimented me on my driving today. They left a little note on the windscreen. It said, 'Parking Fine.'So that was nice.