Beck or possibly a Thunder Ranch, though it doesn't have the flat steel plate down the center of the floor like my TR.
Go to Stoddard and Fibersteel and the Beck site and to Vintage Motorcars and look at the Spyder parts for an idea of what you'll have in it.
Looks like all you need are the lights, wiring harness, fuel tank, fuel cap, steering column, shaft, signal switch, steering wheel, gauges, pedals, switches, seats, shifter, an e-brake handle, e-brake cables, windscreen, mirrors, tonneau cover, fully-dressed engine, exhaust system, oil cooler, clutch, hydraulic and fuel lines, fuel pump, grill slats, marker plate light housing, shocks, battery and some plausible way to register it with state motor vehicle authorities as a car.
Oh and maybe a top and side curtains if that suits your style.
And paint. Probably someone will have to paint it.
If you can get the roller for under $3,000 you could, theoretically, finish ahead of this car, money-wise.