It looks nice and sleek, Not long ago I seen a nice custom fiberglass seat on the auction site and thought about posting it here, I wonder if it is still on the site.
I would say if you want a seat like that you would have to make it, you can make a form and use fiberglass with the form then release it,trim it and have it covered, I have also seen things like skateboard decks being used as seat pans, bought large and trimmed they looked pretty nice but are flat except for the kick tail, some keep that in the front, I have also seen the take the wood board and add the glass to that and make curved edges
The stock seat pan might be used too, when cut the edges need rolled or some kind of edging added so it doesn't cut the new upholstery.
The point is to be creative and look at anything as a possible seat pan provided it is strong enough and able to staple leather or vinyl to.
Most start with cardboard and cut the shape you want then seek out the material you want to use and use the cardboard as a template.
