Keeping seats from rubbing on metal bar?

Recently installed my new PRP seats in my 2010 S. I noticed that the outboard side of the seat rubs on the metal bar. I’d rather not wear a hole in my new seats, so I’ve been trying to figure out what everyone else is doing about this. I’ve searched the forum and google and can’t find any mention of this as a problem, but I can’t be the only person who has come across this.

I stuck a prybar in there and yanked pretty hard, but it doesn’t appear to have made much difference, if any. Smacked it several times with a dead blow and don’t see a change there either… Anybody have any suggestions?