Their are several mfg. making +45mm or higher wheel offset (backspacing or rather less back spacing).

Kosie and BBS wheels offer 114.3x4 in both 17" and 18" combo's
I think BBS wheels from tire rack are +47mm offset if I recall.

In addition, since in most cases a set of aftermarket wheels and tires could run $1200, 2000, 24000, etc. I might even suggest buying a second set of springs. You could use just the rears incombination with a camber kit or use the entire new set of springs.

H&R sells a set of OE sport springs 3/4" mild drop.
Comptech Sells an Accord set of springs which are more aggressive then OE sports but less so then Prokits for a good drop. Compared to tires or rims springs are dirt cheap, even good ones.

The other choice is talk things over with your suspesion shop in the rear, I find my tire guy will work with me on anysettings. We had other employees get in my truck to weigh down the rear to verify my tires wouldn't rub. A nice compromise might be to go halfway between droped off camber and OE stock camber, I'd much rather rotate tires a bit then ever rub in the fender wells.

Or if you are getting a body kit installed have the body shop trim the inside of rear fender well and apply some of the paint used to paint the kit as touch up paint inside the rear wheel well once it is trimmed, no one will ever know you did this if done correctly.