1989 Supra - Looking for Captain's Chair

The Captain's seat on our 1989 Supra has disintegrated.
Where would I find an OEM replacement seat? or Are there any recommendations on replacement seats

here are the dimensions
Wide: 22" - this is the most important to allow for the seat to swivel
Height: 27"
Depth: 24"

Thanks for the help

Any upholstery shop should be able to make one for you. Or -- if you're somewhat handy you could make the seat base and back and take that to the upholsterer to finish in the color of your choice.