Bear wrote: got any pics of the seat and the engine??
The seat is scratch-built - or perhaps "kit-bashed" is a more appropriate term.
Here's a photo before paint:

What (I hope) you can see is the bottom is a standard kit seat with extra chest bracing added from scrap plastic.
Attached to the top of that is part of another kit seat (with the bottom cut off and part of the top cut off). A horizontal "flange" is cut to match the curve of the head restraint.
The shoulder braces are made from those pieces that brace the chassis when it's in the box (removed during assembly).
I bent them to shape with a little heat from a cigarette lighter. Small pieces of bent "Evergreen" rod connect the shoulder padding to the head restraint.
I drilled a few weight-reduction holes for added effect. And after painting it looks like this:

Self-adhesive felt (from a craft store) is used as padding for the seat and head restraint.