New seat cushions

Hey guys,

I drive a vc wagon and my seats trim is in excellent condition, however the cushion is old and tired, and dips heaps when going round corners...

I want to do something to rectify the problem.

Is there anywhere that sells the seat cushions/bolsters?

Or is my only option to go for something newer? Eg a modern commodore? However, this is something i would prefer not to do as i like the original look.

Any advice would be greatly appreciated

Cheers