FWIW: I have about 8 rolls of 120 HIE that is about 2 years old in the freezer. This was from the last batch that David Romano cut down from 70mm Aerographic 2424 (same emulsion and same base as HIE) and respooled as 120. Last batch was $18 a roll as I remember.
It was the only IR film I would use as nothing worked like HIE and all the HIE disadvantages went away with a 120 neg.
I am only doing straight documentary work now so have not used any for 18 months or so.
If anyone is interested, make a reasonable offer. Otherwise I will put it on EBay.
Bob at BobMichaels dot ORG