John, I do not own a Corcoran but know of several.
Of the seven recorded in SGC's population report, how many are now in your collection (did you purchase some SGC graded and break them out)? I can think of at least five collectors that would have at least one if not both poses. If we were to extend the population to Museum collections, I'm aware of the following:
Wharton-Tigar should have at least one, perhaps both
BB HOF has one pose (94-1a)
Met has both poses (posted below)
Library of Congress has one (posted below)
All told, I would think you are at or near perhaps half the total population in your collection (amazing feat). Purely speculation, but I think there could easily be 70+ Corcoran cards out there. I don't believe the 100 card goal would be possible but suggest you go for it so you can join the rest of us in trying to achieve the impossible with OJs.
You need to find a way to get him elected into BB HOF!