I agree with the previous posts, things are all messed up with Covid going on. I too had a backorder issue, but for me, it was not warranty.
Now, I don't know what you need when you say 'column', but if you really want to get your camper back before spring, and don't mind buying the parts, perhaps shop for yourself. In my case, the manufacturer of the part did not have any, and were producing in very small quantities, so I was looking at no use of my camper for a long time. I found the part at a mega-dealer (Colaw RV in Missouri), and had it in a couple days...
It's an option.
Doug and Patience and Shelby the mutt
2015 Crossroads Sunset Trail Reserve ST26RB
2013 Ford F-150 3.5 EcoBoost XLT Supercab 4x4