We are getting into a timescale when people are still living and Rootschat do not allow details of living persons to be posted.
The following is general guidance
http://www.rootschat.com/help/posting_guide.php scroll down to the part re: search for living relatives and click on the links
You could buy a copy of his death cert as it will name the person who reported his death and their relationship to him. It will also give an address for that person
If you know who he married - you could check for details of any children born to them and then use one of the electoral register websites to see if you can find an address
www.192.com is just one of several such sites