I have a pair of Brand New Grey Leather seats from Tesla Roadster for sale.
These seats come with original brackets which should directly fit on Elise and Exige.
I believe these seats are made with Carbon Fiber, but I'm not 100% sure, maybe someone can confirm here.
These are heated seats, so it'll be great for the winter, you just need to wire them. They also has better shoulder support than the standard elise seats.
I was planning to install them in my elise, but decided to look for other seats that can support 6pts harness.
Price: $1300 obo + Shipping or local pickup in San Francisco Bay Area.