I was doing the same research myself last night. I found one place that looked promising, but I'll have to post them tonight. Most of the threads, as you say, are inconclusive on where to get the chems, but I was able to put together a fairly definitive list of WHAT is needed.

@PE, as I'm sure you know, those chems can only be bought at the B&H store, no shipping, but thanks for identifying the part #.