Hi John. I second the suggestion to mix up from dry chemicals, either from Bostick & Sullivan or the Photographers' Formulary. Digitaltruth just resells from both of these suppliers. And in my recent order, Dave from B&S emailed me back to suggest a cheaper shipping option, which was much appreciated.
In general, sourcing basic chemistry is a bit of a hassle up here. And some things cannot be brought across the border (i.e. AgNO3, dichromates, pyro) except in the smallest 'intro' packets, even if readily available at Freestyle, B&S, or PF.