Having replaced panels on both of our trailers...I would say using a salvaged panel would not
be worth the dollar savings unless it was an obsolete formed corner panel. As Richard said - the 70's curves are still available.
It definitely doesn't make any
sense on a flat side panel. We and a friend (47 WeeWind) replaced the same panel on two different 1964
GlobeTrotters - his and ours. The overall size
of the two panels were very
different - 1/2" - 1" each direction. Also, the rivet holes, the rib placement, the water filler hole, heater vent, baggage compartment and wheel well locations were all different one from the other. With the cost of new flat aluminum at about $15.75 a lineal foot 4' high
, the savings
you would realize in dollars would not warrant the compromises that would have to be made IMO.