Yes, it rings a very distant bell with me, but I have done various searches of discographies of singers I thought might have done it, but no positives as yet. (Watt Nicoll, Rab Noakes, Peter Nardini, for example). Might be worth exploring any Sangschule archives to see who was tutoring at the time, though I know that sadly some are no longer with us.
Steve Inglis? Scott Davies? George Machray? Andy Shanks? QAnd yes, worth trying Gifford Lind or others in the Makars group.