Susan, it might be worthwhile to call around your independent mom & pop nurseries locally there. Two of the nurseries I use here do carry Fafard products so they can probably order it for you if they buy from SunGro. I'm in Sarasota.
Just curious, and googled it. Amazon has the SunGro Professional growing mix which came up when I entered "Fafard 52" in a very similar looking bag. Really expensive, though - $43 for 2.8cu.ft.
