Your normal seat covers, just got to repco or autobarns or any form of auto store and they should have a range to choose from. if its the actual cover for the seat, as in the cloth, you maybe be able to find them on ebay.
Ebay has a few mobs that will do a custom fit seat covers. Look 100% better than the run of the mill ones that fit in some places, not in others etc etc. Or if you have a spare $300+ laying around you could go leather
unless he means he has a bench seat and wants a cover for that. in which case drivers = regular. passenger side = custom made? (never seen one to just fit over) otherwise any auto shop should have them. personally i like the look of the RM williams ones. =P
I put these in my VS Ute the other day, awesome seat covers and they are thick so really comfortable. HSV CAR FRONT SEAT COVERS HOLDEN HRT BATHURST CLUBSPORT SENATOR GRANGE GTS MALOO | eBay
i have the same ones as robbo just showed on the link they are currently $40 on sale at super cheap reduced from $60 lol a mate even bought them for 40 didnt really like them coz his a tripper and they refunded him $60 back lol