Some of Ken's recordings have been issued on Boscastle Breakdown (LP 12T240 1974); Ye Subjects of England (LP 12T286 1976) and the Voice of the People 20 CD series (TSCD651-670 1998), but the vast majority of his collection has not been issued.
Forest Tracks is addressing this and has issued on CD-R recordings from Ken's Collection.
The first can be found by clicking on the title below
"A-Swinging Down The Lane - The Willett Family
Tom Willett, Chris Willett, Ben Willett, Tom Willett jnr and Noah Willett
43 tracks of unaccompanied songs and fragments of songs recorded by Ken Stubbs
on location in Middlesex, Kent and Sussex between 1960-1962.
including recordings that inspired Topic Records to record and issue The Roving Journeymen 12T84
Issued on commercially produced CD-Rs using high quality Sony Professional audio discs.
There will be no more CD-Rs of Ken's Collection but all of it will be freely accessible as MP3s on the internet.
This is still being worked on but it is hoped to have this available in Summer 2016.
In 1970 The Life of a Man, 50 songs collected by Ken Stubbs, was published by EFDS Publications Ltd. It is out of print but this website gives more information and a list of the songs: