Rashid Stephen Pettit
They actually came close, in 2007. But, at the last minute, Peter dropped out. Also worth noting, after Phil announced his retirement was a quote on a Mojo mag from Peter that basically said “I’m ready for that reunion now”. I’m sure it’s unrelated, as Peter has no beef with Phil.
They did reunite in 1982, here is the full audio of that show: http://youtu.be/KPdEPC2AsB8