Based on the facts you have stated, your memory is the best thing you have. Perhaps, walking the are around the Drake Hotel would trigger your memory regarding where the office is. Unfortunately, there is no repository for Wills. People do not file them anywhere when they are alive. I would expect the Will to be with your partners important papers. The only other place to look is the attorney's office.
This answer is not intended to create an attorney/client relationship. You need specific legal advice from an attorney who can gather all of the facts