does anyone know if anyone produces new upholstry for these trucks?

 

I don't find a kit like I would for, say, a Camaro or Mustang - but I DO find custom fitted seat covers.

Past that, I'd find a local trim shop or spend some time taking apart an old seat's upholstery and making new upholstery from boat upholstery material (that's a bit more expensive, but it tends to take to weathering and water better.)

RwP