Hmmm that is an option. Let me know what you find out about custom rod length, I know a manufacture that can make h and/or I beam forged rods. Just need blue print or specs. I am assuming your talking about a shorter rod length in the center, Seems simple, get me specs on rod length and I'll get pricing on rods. Other than that, I can usually get forged h beam rod sets for around 180.00 plus shipping which is usually 100.00 bucks. Same supplier many of the known brands purchase from.
Edit* that price does not include arp hardware