Try a do-it-yourself scrap yard, you'll only pay $30 or so for another seat, most likely. It's way easier than switching the seats from base to base...which I'm in the process of doing (can't find matching seats for my cars!). There are lots of springs and wires and fastners holding everything together, and it'll take a good few hours---maybe many!
But good luck if you try it. I'm really stubborn so it gives me courage to try!
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1990 5spd V6 Camry (Still kicking at 393,000km) 1991 Celica GTS -- Pappa needs a 3SGTE...and AWD for all this friggin' snow
Honda my A$$, you just can't kill a Yota...