If I was you I would check out the new Rover PRRT, explained here:
http://web.tiscali.it/elise_s1/index.htm
Get in touch with thet guy and he’ll point you out.
Wanrning, since there is no Exige KIT, it may require some designing.
Thank you Uldis, had stat changed today, now in normal driving it stays around 85deg.and if driven hard does not drop out of the eighties.