Arda if you can get an organic or inorganic fertiliser with an NPK (N=Nitrogen, P=Phosphorus, K= Potassium)measure of around N1 to 3, P around 13-15 and P = zero then it will be roughly the same NPK as bone meal.
About 65 years ago my granny used bonemeal (along with dried blood). I've never used the stuff, preferring fertilizers of known & constant composition. Here are the NPK ratios for some which are widely available in the UK. The ratios are shown as a % of N
Phostrogen (new) 100 : 71 : 192
Phostrogen (old) 100 : 100 : 270
Vitax Q4 100 : 141 : 188
Vitax Vitafeed 100 : 100 : 100
Chempak no 3 100 : 100 : 100
Chempak no 4 100 : 100 : 200
Chempak no 8 100 : 200 : 200
Tomorite 100 : 112 : 200
Phostrogen Tomato 100 : 69 : 196
Phostrogen (acid) 100 : 66 : 100
Sorry - this table doesn't want to post neatly.