I have been searching high and low for this product in the metro Atlanta area to no avail. Then it hit me. I remembered that the biggest and best garden center in my home town of Birmingham, AL just happens to be the number one fertilome dealer in the world. So I called and was told, "How much do you want we can have it delivered". :)
I'm going to save myself shipping and pick some up when I go visit kinfolk next month.
Here's the link http://www.classicgardens.com

I couldn't find it locally either, and called almost every Fertilome dealer in our area.  So I purchased Fafard 3B, which has all of the same ingredients as UPM.  Fafard 3B is what the Atlanta Botanical Gardens uses for all of their potting and cutting growing.  It is a soil-free and fertilizer-free potting mix.

You can find it a couple of places - I picked mine up at Hasting's garden center over on Peachtree Rd. (Brookhaven, just north of Dick's Sporting Goods), and got another bag at Ash-Simpson Garden Center on Peachtree Rd. (about 1 mile south of where it turns into Peachtree Industrial)

I posted more about this @ GW, here: http://forums.gardenweb.com/forums/load/fig/msg0421253211548.html

Search the page for "fafard" and you'll find it, along with a link to the product and ingredients.  Compare it to what's in UPM.  The only thing that's not really similar is the mention of humic acid, although based on what's in 3B, it should have humic acid.