It will probably be alot of work without much results trying to contact a lender directly. It's hard to tell these days who the actual owner of the loan is. Properties are often foreclosed upon in the name of the company servicing the loan. Once the property reverts back to the lender and becomes REO, it will be listed through a realtor. Very few banks have time and staffing to sell their REOs direct to the general public. For instance, my bank may have have foreclosed on properties sometimes very close to my house. It's not practical for me to show it to buyers, handle all the maintenance, dispose of personal property, meet the appraiser, etc.
So be patient, contact a good real estate agent and they should be able to tell you as soon as it's available for sale.