Dear Customer,
I understood your requirements and i can help you create your own completely customized crm as per your requirements and it will not be any open source crm. I also have working experience on creating completely customized crm for bank as part of project lead. So if you can tell me your requriements,i can help you develop your own crm
Waiting for your requirements,you can contact me via skype:sibs2bad so that we can have an initial discussion.
Regards
Sibghatullah Sheikh