1. Shorten it right below that bracket (that holds the clear tube) and drill new holes to mount the bracket.
2. Bend the square tube more to give it more offset, then cut out part of the diagonal section to get the horizontal dimension (from square tube to clear tube) back to factory specs. This method may actually work better if you cut out the offset completely, at the very bottom of the offset, and fab a new section of square tube. It would probably be necessary because of how close the case feeder is to the inside curve of the upper bend. Come to think of it, I'd just make a whole new piece. And I'd probably add a couple small gussets on the bends, to stiffen it up since I'd be changing the angles
3. Combine both ideas and make it even shorter.
Like I said, it all depends on how handy you are. But I work with metal for a living, so modifying this would be easy for me. If I had a case feeder to snag a couple measurements from I could easily make these, and probably fairly cheap too. I'm actually surprised a company like Inline Fabrication doesn't make them already.