OK the 15" Aero rim are the cheap ones to get. The 16" version are the ones with higher price. But since the person that has started this thread, the VL HDTs had either 16X7 Momo Star or the rarer 16X8 Momo Star, both do cost a mint and much harder to get. Some VL HDTs ran Simmons rims too.
Best thing to do is go and see Sid and the crew at HDT www.hdt.com.au, they will help.
Alright I bought this 87 VL Belina had 4 HDT rims 205/65/15 tyres on them. I will give it a good polish. Not sure how much they are worh or how hard/rare they are, but picked up the whole car for $650 on the weekend.