checked out the cover in the lexus parts department, they wanted 240 for a piece of sh*t cover. it looked like a $20 special to me. it was one of those thin jobs that was really rough. i'm gonna search for an aftermarket flannel.
Yeah, they wanted 220.00 for a cover so I went and bought one made of Evolution 4. I have to park mine in an apartment complex and was afraid of dings. This cover was pretty thick and provides good all around protection from dust, moisture, and UV rays if I park it outside. The only problem is it takes up quite a bit of room in the small IS trunk. Make sure you get the one that fits 15-16 foot cars. The 14-15 footer was too small. Cost on those is 120.00.
Let me clarify: The car cover I bought was $120.00 + tax from my local car parts store (I think it was Pepboys, you could even check out Kragen). It's made of Evolution 4 and was not custom fitted. Bought the cable and lock separately. If you don't need one that thick try one of the 3-ply car covers as they are easier to handle and won't take up as much space in your trunk if that's where you intend to keep it.