I thought to myself why leave someone else to do the work so I got in touch with Malcolm Taylor at the EFDSS.

Here is his reply prompt reply - reproduced with permission as you can see.

....please pass on the fact that we don't have any digitised material from the PK collection. We do of course have the BBC discs, which might or might not amount to the same thing. But nothing from Peter. We bought a number of Folktrax cassettes in the 70s (before my time) but that is all we have direct from him.

Now Fred, get in touch with the NSA and see what they say.