Who do I contact at major banks to obtain requirements for Oil Gas and Mineral Lease subordinations?

Who do I contact at major banks to obtain requirements for Oil Gas and Mineral Lease subordinations?
It is very difficult to locate the people who handle these transactions at the banks because the customer service people have never heard of these kinds of transactions. I have spent days and weeks trying to track down bank requirements for the captioned process. I buy the info from a website. Check out www.ogmsubordinations.com . Its expensive but a whole lot easier than trying to track down the requirements yourself. The service is also tax deductible so it really offsets the cost and makes for a good write off for us 1099 folks. Good Luck!