Just lost the rear rim on my 92 Santana Rio. Spokes appear to have pulled and torn the alloy. Hub, Freewheel and Drum brake seem ok. I'm looking for an economical repair and am having trouble locating 40 spoke 26" rims. Any suggestions for rim suppliers or for inexpensive wheels? The Tandem has many miles on it and really needs a complete rebuild to restore it to its original condition so it doesn't seem to make sense to pour alot of money in it when the low end new ones are only around $800.