This one is not truelly fitted. Be careful when you see "custom". That many times means they have several models to fit a range of cars.
If you want it to fit like a glove, try California Car Covers.
I am taking a look right now, although you comment about 'custom' may not be the best, as this is the first thing I see when I go to the California Car cover page LOL
Edit: $175-$700+ for an indoor cover is crazy IMHO, if I had a bentley, maybe, but I am simply trying to keep dust off it LOL. If I had FP money, I would have 2 of them