I am thinking these are the tunes that get one "rusticated" from the Morris orthodoxy.
The origins of Molly are quite anarchic, aiming to shock and confuse. "orthodoxy" isn't in our nature!
Hence the drive to find or write music that sounds as unlike conventional morris or country dance tunes as possible, while still being danceable.
All Molly is based on a very small amount of collected material, the music mostly based on common country dance tunes. A great deal of inventive development has followed as the collected dances are simple and repetitive and don't make great entertainment in their original form. In any case there's plenty of evidence to suggest they were fairly improvised and not based on any long and respected tradition, so making up your own dances is quite in order.
See Tony Forster's article at
http://www.pigdyke.co.uk/what-is-molly.php for background.
Have they been collected in any tune books or sites?
They are on CD - see
http://www.pigdyke.co.uk/music.php under "Music Recordings"
Rob didn't read or write music, and we didn't want to sell any remaining or newly manufactured copies of the early band CD or his solo CD as there might be confusion about who was entitled to the money raised - so we put them on the site for free download (with permission from his family, of course)
The current
Music 2009 CD is based on tunes we currently play, though we have introduced one new tune since then.
For completists there is also
http://www.pigdyke.co.uk/frostandfire.php which is another musical collaboration of Rob's that has very little to do with Pig Dyke's music.
The version of "Jack The Horse Courser" that Alison's just posted is pretty well exactly how we play it.
(though I add some harmonies and we jazz it up a bit)