You may be able to find an original if you keep looking. SOmeone is gutting a trailer somewhere.
If all you want is one that will work, be comfortable and you can get in diffrent fabric choices try
www.braddandhall.com .
They sell all of the flexsteel stuff and you can order it with many diffrent fabrics.
If that is to rich for your blood, go look at the current models and see if you can "steal" some ideas. All it takes is some basic tools, time and a bit of money.