John's story and his association with Harry Balk, Impact, Duke Browner and the TL song were all told in There's That Beat! about 6 years ago. (Issue #2 I think). He's a great bloke and was joy to interview.
Coincidentally: Nick and Dino (the co writers of TWPYB), also had a release on Impact Records and if I remember correctly, were the writers of Gloria Gaynors Massive disco smash - I Will Survive".
Best,
Dave