To be clear, I said for her to order it and posted the same link you did. I also mentioned it is very rare to find them in stores unless you have a commercial supply in your area.
There are several commercial supplies around me as I live in a very blue collar and industrial town. I have a Valspar factory, Kraft factory, Sherwin Williams factory, US Foods, Peterbuilt factory, the list is long... all within about a 3 mile radius. The one in particular I go to is Leslie's Commercial Service Center. It is not a storefront, they do not have float toys or anything like that in their lobby. Just some huge containers of chems and a counter where folks can look up stuff for you and go pick it out and load it up for you. Truly only a commercial supply. I like it because there's nobody there to test your water or to try to talk you into any junk.
http://goo.gl/maps/vfxsv
Pool Plaza is just to the north of me, and has the K2006 and the individual FAS-DPD.
http://www.poolplaza.com/P-K-2006C.html
The 870 and 871 isn't on their website, but they had it last time I called. I didn't go in because the Leslie's Commercial is a lot closer, only 2 miles from my home.
With all that said, I have no problem showing a picture of all my reagents. 99% of them are from Dave. I have one container of Taylor 870 because I ran out and needed it quickly.