Nah, it's simple enough to find one in good condition...but you're right about the welding. If you can't do it yourself, and you don't know a backyard bodyshop guy, it can be really freakin' expensive.
Unfortunately, welding on another quarter panel is the only acceptable way to fix the wheel well rust. ANY other solution will rot-out within a year or two.
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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...