This same issue is on some other brand motorhome threads. We went through similar, but ended up trading coaches before changing the seats. I've seen where people have repositioned the stock seats / pedestals which of course requires drilling new mounting holes and making sure proper structure is tapped into, or, completely changed the pedestal and seat. It can be done no doubt. All depends on how much money you want to sink into it. Our plan was to put some leather seats out of a Ford van or truck. We wanted seats with better lumbar, and some that were narrower. I know why they make the seats wide, but after driving a class A for 6 plus hours, spreading my wings just to get my arms on the rests became very uncomfortable. Heck I was hurting bad after just 3 hours. I feel your pain and hope you can come to a good resolution. It's yours, so make it worth the money spent on it. What good is a $80k plus rig if it isn't comfortable to drive.
I do like what DJL1967 did. I've heard of that as well, and is a great alternative to new seats.
John and Rebecca Dickson
Emma-8 / Little John-5 / Iva-1+
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)