Contact Sharon Heritage, Cosmic Breed Mod Gear, she makes seat covers, I got a shaggy Zebra skin seat cover for my GT200.
Did you want genuine cow hide or imitation?
Mine is imitation with elastic edge for easy fitting.
It was purchased from a stall at the VACC Luna Park to Carlton Ride two or three years ago.
I'm sorry but I don't know the name of the seller.
I think the lady came down from QLD for the rally.
Contact the VACC Rally organiser.
They may be able to provide you with contact details of the stall holder.
You could try this company, Australian Cumfy Motorcycle Seats, based in Glenroy, that Karen put me on to at one time.