Yes, I'm _well_ aware of all of the various versions of coolant, phosphated vs non, silicated vs non, edta tetrasodium salts, and so forth.
The problem is that I've only found one company making a "Pink" concentrate, which is Recochem, and apparently I'll have to order that. As I said, using the 50/50 prediluted isn't an option since I'm going to be doing a full distilled water flush. The thread before simply ended with "Use the Toyota Pink Stuff" - which is diluted.
So, if I can't find (reasonably locally) a concentrate of "Pink Stuff", I'll have to use something else, and just change the fluids every three or four years. No big deal.
[Edit] - I can find the Toyota _Red_ in concentrate, but no definitive information on if it's forward compatible.