Amazingly Ian many of the recordings have survived and are uploaded to the web where you can listen to them - though it will be a labour of love if you do I fear. Give me a moment and I'll try to find the link.
If you open this link:
https://www.vwml.org/archives-catalogue/JMC
Then expand the menu of disc & cylinder recordings (at left side) by clicking on the arrows beside them, you can then pick a recording of your choice.
This will expand a menu on the right of the page, click the round orange thing below the word 'media' and away you go.
(Sorry if teaching to suck eggs, it just didn't appear obvious to me!)
If you open this link:
https://www.vwml.org/archives-catalogue/JMC
Then expand the menu of disc & cylinder recordings (at left side) by clicking on the arrows beside them, you can then pick a recording of your choice.
This will expand a menu on the right of the page, click the round orange thing below the word 'media' and away you go.
(Sorry if teaching to suck eggs, it just didn't appear obvious to me!)