If you're deadset on rebuilding this car, you can buy the Exige EVO (which has the longer chassis similar to the Exige RR) and fabricate the front clam, probably only run you about $200K

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2005 Lotus Elise (Jet Blue Metallic) - ForcedFed 340
2002 Ford Focus SVT (Pitch Black) - Powered by 4.6L of V8 goodness