"Finding a proper supplier will take urban gardeners a bit of research. Farm and ranch stores and feed and grain dealers are the proper sources becasue most of the materials going into COF are used to feed livestock. If you should find COF ingredients at a typical garden shop, they will almost inevitably be offered in small quantities at prohibitively high prices per pound. If I were an urban gardener, I would visit the country once every year or two and stock up."
3 parts any seedmeal except coprameal and 1 part "tankage" (sometimes called "blood-and-bone" or "meatmeal").
1/4 part ordinary agricultural lime, best finely ground
1/4 part gypsum (if you don't use gypsum, double the quantity of agricultural lime)
1/2 part dolomite lime
1 part of any one of these phosphorous sources:
finley ground rock phosphate (there are two equally useful kinds - "hard" or "soft")
1/2 to 1 part kelpmeal