I'm interested in this too. A bit of nosing about shows (there was a url link here which no longer exists) from '06, talking about an Adelaide-Based company (not sure which - AceChemicals are the people I use and they don't stock it). Freestyle sell
this, "Weston's Amidol Powder Developer", which
contains amidol. It's not marked as HazMat by Freestyle and they'll ship it internationally. The same is true of
Photographers' Formulary, they wont ship pure Amidol internationally but it seems as though they will ship amidol containing developers.
ChemSupply have
a listing for it here, under "2 4 Diaminophenol dihydrochloride 98%". Could be worth investigating.