The outfitter I use for hunts in RSA, Namibia, Zimbabwe, and Mozambique does not do any stocked animal hunts. He does have size charge difference for RSA Kudu.
Up to 54" is one price...
54" and over is another price......
If your PH tells you it is 53 7/8" and after you shoot it the tape shows it to be 54" plus........you pay the lower price.
Well, there is a price change for bull elephant as well, but I have never heard of them not being priced by tusk weight.