So as to find your own BINS, most probably you will need to spend some money in buying more than several cc and trying it in different shops. Some of members selling BINS but never bought it myself. Can't say anything about that, maybe other forum members will advise you more on that.
Open this topic and
https://crdclub.su/showthread.php?t=56829 There you will find some hints that might help you to understand more the process.
Just use translator if you do not understand Russian.