I have some rare ULF Fuji Neopan 100 (Acros) 14x20 for sale. This was a custom order for use with a custom 14x20 Deardorff. We simply bought too much film back around 2010, projecting remaining lifetime usage. It is an amazing film ... no reciprocity failure for metered exposures up to 2 minutes. I've tried that and it is true. New in original box, 20 sheets per box. In cold storage since new. Expired 2012. Recently tested and showing very little base fog - actually good for most alt-photo printing.
While there are not many custom 14x20 cameras out there, this film could easily be trimmed down to 14x17 or 12x20. Twenty sheets per box. Due to rarity and comparing to other LF film in 14x17 and 12x20 sizes, $650 per box seems reasonable. I have 5 boxes for sale.