You should have offered to include a free T Shirt with every purchase of Cool Tone developer! Two birds with one stone!
For those near my neck of the woods, Leo's Cameras has 6 bottles of the Cool Tone Developer on their shelves.
And Simon, just to give you hope, I recently purchased some Ilford Fixer. With respect to the major B & W chemistry (developer, stop bath, fixer and Hypo eliminator) that is the first non-Kodak chemistry purchase I've made in 40 years of darkroom work (I think - there may have been a rogue bottle of vinegar in there somewhere).
I must confess though - a lot of it had to do with the shape and size of the bottles - the small Ilford bottles fit in drawers!.
Do you think there might be a chance for chemistry in 1 liter bottles that are short and squat - say 10 cm x 10 cm x 10 cm?