I believe he managed Matlock after he left Boston, so someone there might know his whereabouts. That's going back a few years though. I think his brother Ian was also a footballer though not for Boston.
I guess the current footballers have it easier in terms of keeping in touch with former team mates. Unfortunately players from the era we're talking about wouldn't have had Facebook, twitter or any other social media platform. Sorry Cookie, you're just a bit too old!