I could have cut it, but didn't feel like breaking out the dremel. Besides, I can just swap with the old LD3 (which took about 10 minutes) and order another one at some point.
The more I think about it, I somewhat remember having 2 complete aluminum racks, one for each car. For some reason, there was too much play in the shorter rack, so I pulled the one from the LD3, put the plastic rack on it and tossed the short aluminum rack. At least I think that's what happened