i would really like to try the 5-1-1 soil mix but am not capable of the very long drive to the nearest source.
i've looked all over the web, but haven't found any.
i must have it delivered or do without.
The only thing I could recommend is you stop searching for "fines" and ask for "Pine Bark Soil Conditioner"
You'll probably not be able to find it on the internet, as shipping would be prohibitively expensive. If you can't get it locally, you'll have to make due with
What is the name/city/state of the garden center closest to you where you get the MG potting soil and pearlite?