On my wife's '09, I took the seat to a local guy who does auto upholstery. He cut a circle out of the seat pan near the front (as large as possible before you get to the ribbing that stiffens the seat pan -- looks like about 10" diameter) and then pop riveted in nylon webbing before putting the original foam back on and re-stapling the vinyl. That adds a noticeable amount of "spring" to the seat where her butt sits, and drops the effective seat height by an inch or so.
I'd post a pic, but he put a cloth liner on the inside to pretty it up, so you can't see what was done.