Ilford has announced their annual special order program for ULF and odd film sizes. Deadline to place orders is August 14,2020 at participating dealers. You can order from their FP4+, Delta 100, and HP5+ films. Not all sizes available in each film.

I ordered my ULF film from The View Camera Store whose pricing was a bit lower for the size I needed.

Other vendors in the US are also participating so check your local or favorite camera stores.