I have a dozen CA3080 in metal cans that I bought in the 70's. They're unobtainium now...Ask around on this and other fora. I don't have any of these, but lots of geezers have lots of old parts. Many will send them out for the cost of the shipping.
EDIT: well not completely unobtainium. Apparently this place sells the metal can version for $13 and has hundreds in stock
http://store.americanmicrosemiconductor.com/ca3080.html?gclid=CMzokqCw4NICFUKUfgodeFcOhQ
This article said OTAs were going to make opamps obsolete...
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