One of our sponsor's sells this device
https://www.sliderg5.com/
add a base like this
SeaSense Seat Base Swivel, EDC
https://smile.amazon.com/SeaSense-Seat-Base-Swivel-EDC/dp/B0006JJ3F8/ref=sr_1_6?ie=UTF8&qid=1495405272&sr=8-6&keywords=fishing+seat+base
That might do the trick. regards, richg99