Thanks to all who replied. I'll certainly check out the music makers
site - it looks pretty good at first glance.
I've also found that Mike Batt's company, Dramatico, publishes all
his Womble songs, plus most of his other stuff. I don't know if
they're retail as such, but I'll let you know how to obtain them when
I get a response. Published music has to be avilable in some form,
even if unavailable at a retail level, because without it no one
could ever do a cover version.
Mind you, I'm not planning on releasing Wombles songs any time soon !

http://www.dramatico.com/musicpublishing/index.html