Fat bucket seat coming soon.:)

[TalonMotorFabrication]

I've have been using the back seat from a Ford Cougar with the sub frames removed and just wedging the foam seat base and back section in to the chassis, this has got me thinking about making some proper padded seats.
The old mans Locost has a pair of the Westfield type seats which are soft but being bigger I don't fit between the lumber pads, I don't sit in them rather on them.
What I'm looking in to making is a light steel sub frame seat, padded with PU moulded foam pads (non water absorbing foam) covered with leatherette or vinyl, if I can make these for a reasonable price (no not cheap) would there be any interest?

What are peoples thoughts on GRP seats verses the Westfield/Cobra 7 type seats, I've drawn up a rough list of arguments for both.

GRP bucket seats

Pros
100% Water proof
durable
light
can be trimmed as in cut to fit
can have pads added

Cons
fixed angle between base and back
some times suffer from weak captive mounts
very little shock absorbing properties
shoulder harness holes fixed so non adjustable
quality some times brought into question
pads move about or detach tear from glue

Cobra 7 or proper car seat

Pros
soft bolsters which adjust to different people
shock absorbing
light rain wipe dry if leather/vinyl
comfortable on long journeys

Cons
often heavy
too narrow across lumbar for bigger people
foam soaks up water
often expensive
very little choice