Boxes of 25 sheets. If the order completes before the April price increase it's $75 per box.
Not sure why Keith chose to attempt to get an order together for TMY-2 instead of TMX, but most of my LF lenses need all the speed they can get. I don't know anyone with an available light f/1.4 250mm in a Copal shutter.
Honestly the web site isn't a great marketing tool for him. It's a little difficult to find stuff. But it is there, and you can call him at the phone number on the page. (480.250.3990)
It is clearly a small operation, but if he can get the film, then that's what counts.