Good advice below, especially Lori's. As you probably realize by now, the people you're calling are just "blowing you off."
You might also contact Building Service Contractors Association International at http://www.bscai.org They represent commercial cleaners and may have some advice (or even some publications) on the subject.
Here are a couple of additional possibilities:
Steve, you pose an interesting question. From our experience, it really depends upon the attorney and their internal system, follow up and persistence in handling short sales. Their participation appears to depend upon the price point of the property and complexity of it. Typically, million dollar properties we have seen handled by attorneys. Under $500,000 by short sale negotiators or attorneys if borrower owned a portfolio of properties and is liquidating it.
Some short sale negotiators work miracles. Some attorneys make a mess of it. It is truly dependent upon the situation, the attorney, the borrower and the lender(s).... more