I'm seeing oddly placed html links on forum posts, they are "Skim Words" links.
The links are poorly placed, nearly random, and have nothing to do with the content of the thread.
I do not believe this is a positive addition to this otherwise fine site.
"Do I have any options?"
If this is a home rack, you could consider 4 pieces of 1.5" long material to make a spacer on each end of your rails (presuming the doors/covers will still close), yes it would probably have to be solid stock. drilled and tapped on both sides of each block, but aluminum...