Susanne, back in 2005, mentioned briefly (and provided lyrics) for "Benny Lynch" by Matt McGinn. Here now is a YouTube of it, with Matt singing: https://www.youtube.com/watch?v=pr-H4oBhe7g
Benny is now also commemorated, along with other Glasgow characters of note, in a large mural on the outer wall of The Clutha Bar, since it was restored after the terrible helicopter crash there in November 2013.