AFAIK here's something that has been unheard up until now: Wienerworld have released a 4-CD set called "Something Inside Of Me" featuring 5 recordings by Danny Kirwan's pre-Mac outfit Boilerhouse. But browsing through the other contents this seems to be a quite interesting compilation throughout - the Boilerhouse tracks of course being the center of attention for Kirwan aficionados.
Here's a little teaser - "Silly Old Mean World":
https://www.juno.co.uk/miniflashplay...7-01-03-11.mp3