The Esprit S did not make it to the US, nor did the 87.. You are looking for an 88 or 89 stateside. The difference is actually a lot between the two. The 88 cars use a Bosch mechanical f.i and also a Citroen transaxle with inboard brakes. Both the Bosch f.i and Citroen trans are becoming very scarce on the available parts list theses days.. So keep that in mind. The 89 car is the precursor to the 89se.. It uses the delco f.i and the Renault transaxle.. Parts are more readily available for the 89's although there are less 89's made, it would be a better option. They can be had for around 20k for a nice example..
2014 Fiat Abarth (every bolt on)
1997 Lotus Esprit V8 TT
1988 Lotus Esprit Turbo
1977 Lotus Esprit S1