Best sourse for a new seat cover

Just got this bike, '78 KZ650, and I need a replacement seat cover. I am pretty sure that the seat is not stock, as I have not seen any pics of bikes with this seat. Pan looks like original equpment though.
Thanks

I have contacted B&H Specialties. They may have what you need. I do know that they only have covers and not the foam, but their prices seem pretty good. Their site is www.motorcycleseatcovers.com/index.htm