Who would be person at the bank/lending institution to discuss a possible land excange?

In follow up to your last question. Ask for a loan officer, They will be able to help. or maybe they have a seperate REO officer. (real estate owned)= REO

I dont think this is in a banks remit but you need to put more information in the question.

Lenders are not in a position to trade properties. Just isn't going to happen. If you are interested in a property that is lender owned, you are going to have to purchase it from them.