1979 Roster Mosaic

I have 94% of the 1979 Roster signed.  I am missing Brian Greer and Mike Hargrove.  I can't find anything signed by Greer or an address for him.  I have a signed card of Hargrove coming, it is a Panini product so it doesn't a logo on it.  I think I can do something with to make it a Padrograph.  If you know Brian Greer please let me know.