This question might be better asked in the Owner-Operator forum. If it is possible to do I am sure an OO has done it. I might also add good luck getting a company to allow you to mess with that driver's seat!
I have a Minimizer Long Haul seat that swivels and if you find one I’m sure you’ll love it I was going to search before getting this seat but I would think some sort of RV base or dealer would have the part