Aerial films are manufactured with TAC as well as with PET bases and in base thicknesses of 60μm and 100μm.

The 5 films I referred to are all on 100μm PET base, which should add to stability.

For comparison: Kodak Tri-X 320 and Ilford Delta 100 sheet films have a 180μm PET base.

But I guess film stabililty in ULF is an issue anyway.