Mike, thanks for the pointers, especially the nasal advice
If you look in the article the dyes have I.C.I. written after them +plus+ a number which I omitted because I didn't know better... so is that international color index? Those numbers might help you make a match.
I'm sure that many other dyes could be used but that these guys found the most 'perfect' combination, but that's not to say that others wouldn't be suitable. A source with dye transmission values could help us create our own concoction.
Please feel free to report back once you have a look at your stains.