I bet you could find someone looking for a 17" and swap it, in fact if your rim and hub is real good... my son would likely trade you if his is an 18 so he can go 17-17 on his.
Jewbacca said:There's a bunch of wheels that'll swap so long as you get the width and spacers right. As long as the wheel is narrower you can have some spacers custom made to center it up, and if it's still a drum brake, no worries. If it's a disc, it can still be done, but will take some fabrication of a caliper plate and master cylinder mount on your sets.