I'm the one shilling for AutoAnything.
Believe me -- I have nothing against Shinoo and Sector111. Based on my experiences, I like to recommend AutoAnything to others because they are a very nice place to deal with. I have no affiliation with them, nor do I get anything for recommending them. My "affiliation" is that I've bought a couple of covers and a bunch of other stuff over the past few years.
This being said, I know that the Cover Craft "Snug Soft" is available for our cars. I just got a sample the other day, and it really does look like a nice material for indoor use. It's a thin spandex-like material (in a number of colors) with a low-nap fleece on the inside (like felt). Having seen a picture of the "official Lotus" cover, I would guess that it's made of this material (probably by Cover Craft).
I priced the Snug Soft at AutoAnything for 200 bucks. They have free shipping promotions periodically, so it's a pretty good deal.
Just passing along what I know...