As i stated in another post, most grow companies will not provide a ready to use mix of soil because there is not a large enough market for them to have a need to sell these types of mixes. they're dependent on you buying the bottles and using stuff up and and having to buy more. that being said, the beauty of the direction you are heading will make you less dependent on the grow store (or even not have to go at all!), and those big companies. not saying big companies are bad, but we all know what happens when billions of dollars are at stake, greed takes over (in most cases lol not all).
Recipe:
33% highest quality compost you can get your hands on, 33% drainage (pumice, rice hulls, lava rock, whatever you want to use), 33% sphagnum peat moss
amendments per cu. ft. of the above mix (cuft = 7.5 gallons)
1/2cup neem/karanja seed meal
1/2cup crab shell/meal
1/2cup kelp meal
1/2cup oyster shell flour
1/4cup alfalfa meal (optional)
3-4 cups of rock dust (using a variety of different dusts is good)
other optional amendments are
soft rock phosphate @ 1/2cup
gypsum @ 1/2cup
organic fish bone meal @ 1/2cup
mix all together and water in with a compost tea (earth worm castings + unsulfured molasses bubbled for 24-48 hrs) and keep it moist for 4-5 weeks before you plant into it.
this can be a no till recipe and is for many, or you can break each pot down after harvest and REUSE the soil by amending it with the same things you used to amend the first time, just at 1/4 or less of the strength, rewater with compost tea, and keep moist for a few weeks before planting into it.