I have an excellent gunsmith, Fortunately he is younger than me and will certainly outlive me, so I am worry free. I am too old and decrepit to actually do any real gun smithing anymore, so I am grateful for his friendship and his craftsmanship. I hope that you can find someone just like him that will work for you.
BTW, I saw some nice work at a couple of shops in Namibia. If you can't find someone in the RSA, you might do an internet search for smiths up north.