If you don't want to have it sent to you in the mail, you could just get some Bonemeal, bloodmeal and Phosphorus, along with a chemicle micronutrient that would work...
You have to get the correct measurments for all the different stuff though, I don't know to much about mixing them. also, wormcasting are a great source of Nitrogen if you don't want to use bonemeal.
Miricle grow is shunned against in these forums before of it's PH, but it doe's work and for some growers and it has nutes built in. I used it once with no problems.. Give it a try, it wont hurt. you can always ajust your ph accordingly with some Amonium sulfate. 1 tablespoon per gallon every third water works good for me...