Chelating agents for ascorbic developers.

I haven't been bothered with the sudden death syndrome of ascorbic developers yet, but that may be because of good chemicals and a clean water supply.
However it's time to experiment with chelating agents.
Dequest 2010 has been recommended, and EDTA was not recommended.
I can get EDTA, but i have no clue where I can get Dequest 2010 unless I buy a long tonne of it.
So who sells it, and do they ship overseas?