Hi Timbo
Best advice is check with PHASA , the South African professional hunters association hopefully they can help you.
I did a few years ago deal with a Gerrie Du Preez who booked a client for me from the UK, the hunt went very well and in fact the same client is hunting again with me this year. Cut a long story short, there was an outstanding balance that Gerrie was supposed to pay me that I never did receive. I tried contacting this Gerrie every way possible. His email address changed, the website disappeared, I contacted PHASA they never heard of him I asked PHASA to circulate a message to all their listed members to help me find this guy , I had no luck at all making contact with this guy. Even the client who hunted with me tried from his end to no avail . Anyway fortunately the client is now a friend and will be hunting with me again .
Look there is a Gerrie Du Preez listed with PHASA just not the one I was looking for, so it is possible that your guy could be legit as Du Preez is a common name. I can not remember if he had a second name as you are wanting info on a Gerrie S Du Preez. The guy I dealt with was just Gerrie Du Preez , so it is possible these 2 guys may very well not be connected.
Best of luck
Wayne Van Den Bergh