He is listed here:http://www.gbrathletics.com/nc/rsa.htm
as 1983 LJ champion.
Not much, but it may at least give a date range and event to search more deeply.
Update: Just searched all-athletics.com, which lists his dob as 12 May 1960, and
this one LJ performance (noted as his PB):
8.14 Potchefstroom (RSA) 22.03.1982