Hi Rudycob!,as WCA says ! have nearly finish a G-46 which will be sold when completed but I am thinking of build another one using a LOTUS Elite or Elcat as a donor.
This is not only because I have one but the wheel base ect is close to a SE5 with the chassis, running gear and engine (160bhp) being just a bit more sporty.
The construction tecnique would be very similar to the original using the floor-pan and baulk-head but a steel cage-frame would have to be custom made to support the G-46 body work.
The cost of these car range from £500 up, the S11 have a galvanized chassis and of course not forgetting V8 conversions of this car are very common
A simple task for a man of your experience