I remember Alan first getting those two copies. When he sold up, I’m think his went to John ‘Ginger’ Taylor as I seem to remember him playing at Kettering (soul nights run by Karl Boddington) . The other went to Carl Fortnum, if my memory serves me rightly. You never know they may still have them.
I vaguely remember John Manship possibly following up and had a copy or two. If correct, John will have records going back that far to confirm or deny.