I talked with Mike at Artcraft and he will sell a larger kit than the formula listed above. Basically it is four times larger. I think the .25gr of phenidone is hard for him to measure accurately.

TEA 300ml (sends pint, you measure out the 300ml)
Ascorbic acid 20gr
Pyrogallol 40g
Phenidone 1g
TEA to make 400ml

He sells the above for $20.00 plus shipping.

Dilution 1+100 or up to 1+500