Wheel well skirts?
 

Are there any aftermarket parts available that stick on like side skirts, but to the wheel wells to fill in the gap? I'm getting 17" wheels installed with 255/40 tires on stock suspension, so I'll have an increased gap.

Lol never heard of those before. Goodluck.

Why don't you buy the correct tire size and slap some springs on it?

Or you can get these balling fuckers!

http://www.cruisermotorsports.com/Wheel%20Well.jpg

Lower the car

Yeah, I didn't think so. But it was worth a shot.