I took the armrest apart on mine, pulled out the already broken backseat cupholder, and disassembled the whole thing as much as I could. Then I just sat and looked at it for a bit, thinking about what I could do with it. Then I had a wild idea to try a couple of pieces of 1x4 in there, and they fit after a bit of cutting to length. A couple of toilet tank bolts at the very back for strength, then screws everywhere else to put it back together. The plastic under the foam padding was also broken in mine, so the center sagged a bit where you arm usually sits, so I padded it back up with old phone book pages. I thought it was a little stupid to use wood and paper, but it works, so it's not stupid to me.