I believe that the following formula appeared in the Dignan Newsletter many years ago.

Diafine Substitute
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Bath A

Distilled water (50C) 750 ml
Sodium sulfite (anhy) 35.0 g
Hydroquinone 6.0 g
Phenidone 0.2 g
Sodium bisulfite 6.0 g
Distilled water to make 1.0 l

Bath B

Distilled water (50C) 750 ml
Sodium sulfite (anhy) 30.0 g
Sodium metaborate 20.0 g
Distilled water to make 1.0 l