I like the 918, but it's a little spendy. I'd settle for a Memminger Roadster 2.7
...with a mild hybrid created by adding a Buick laCrosse altermotor to the Type IV boxer mid-engine.
As for a production hybrid sports car, Toyota could have implemented the Alessandro Volta as early as 2004:
https://en.wikipedia.org/wiki/Toyota_concept_vehicles,_2000%E2%80%9309#Alessandr o_Volta
http://www.carstyling.ru/resources/studio/2004id_toyota_alessandro_volta_02.jpg
It has a well proven drive train out of a Highlander/LX400h SUV swapped end-for-end, with the V-6 in back. I have an example of the 68hp electric [rear] axle that may go in a VW Beetle some day.