Defrenzy - had a mate who owned an orange 6-Pack. You could have eaten your dinner off the engine bay, it was so tidy. Had the Bathurst tank, too (filler caps on both sides of the B pillar and no boot space). It was (at one stage) the fastest accelerating production car in Australia, even thrashing all the V-8's.......he said it could snap your head right off your shoulders, but the thing guzzled petrol like there was no tomorrow.
I assume you're in Oz, (where?) maybe try Sherriffs Mini Cars in Sydney. Cavalier has done several 1/24 Oz-specific cars (EK Holden, ClubSport, HK Monaro) - maybe they are going to do Valiants - you knever know.
Victoria Hobby Centre in Swanston Street, Melbourne are also a very good source of info - if it's made, they'll prpbably know about it. If you're not in Melbourne, email me and I can call Vic Hobby for you and find out.
Cheers,
LeeTree