I'm not sure if it'll help or not, but frozen Plus-X has kept up really well for me in two instances.
I bought a large lot that expired in 1976, frozen since new, and believe it or not, it was perfectly fine with very little extra base fog.
I also got hold of a large lot that expired in 1996, frozen since new, and that was like new.
You stand a good chance of sitting on a batch of very good film, Jeff. Plus-X is wonderful stuff.
I agree HC-110 is fantastic for expired films; it keeps the base fog low. If you expose generously and use the developer at Dilution B, especially. The longer the film is in the developer, the more the base fog seems to want to show up.
- Thomas