should be able to get them from Flexible Drive Agencies, had the custom one made for my VS to suit my 4 barrrel throttle body
which was essentially a VH 308 Cable but had VS end on the Accelerator pedal end, as VH is slightly different. Also had them make it with a metal thread, instead of the plastic one where you bolt the bracket on the manifold
the guy here at the Adelaide one told me they use to have the contract for Holdens, so they have info on the ends and lengths of the cables
https://www.flexibledrive.com.au/contacts/contacts.php