I know there are a few around because TAFE auctioned 20 DeVere 504s about 18 months ago for $150 each - I got one. I suspect that if you posted a few WTB ads that one might come out of the woodwork. Maybe a Wanted poster in the windows of Total Photo and Atkins would get you somewhere?
PS assuming you're not Tim D and we already know you you should join the rest of us Adelaide film nerds for monthly pub-night and film-trash-talking. It's like a camera club without the oneupmanship and competition.