Iain C:
Many of these turn up on eBay, often not requiring 'good money'.
Some people try to get high prices for them, but my listings normally start (and often finish) at £3.00 because I'm only selling off spares picked up while trying to complete (or improve the condition of) my collection.
I've started (very slowly) scanning my collection, starting from the earliest. So far I have full page scans of 1950 Summer, 1951 Autumn, 1952 Summer & Autumn, 1953 Spring, Summer, Autumn, 1954 Spring.
As I've offered elsewhere, I am happy to transcribe words for anything which isn't already on Mudcat, and even add the tune in ABC notation.
If anyone needs an email of a scan of a particular song, I'm happy to provide it. A fuller list of contents of the various leaflets is Here on Mudcat
Cheers
Nigel