If no one has a current business or home address, they can pay the small fee for an online background check that will suggest relatives and possibly other things.

The page below is an example that gives a few phone numbers to try and the names of some relatives. The full report costs money.

https://www.fastpeoplesearch.com/michael-l-astleford_id_G-7610653087401183903

The current address in the link above is just a UPS-store mail-box.