I would toss them into the scrap pile. they are old, brittle and are waiting to fail on a good hard bump,, lets face it we are east coast folks our pot hole riddled roads can be brutal on this old stuff..
Check these folks out,
http://www.generalspringkc.com/Leaf_...966_s/1821.htm
also drop a dime to the folks at springs and things in Danville Pa,, I have had excellent service from them in the past..