I can only speak to SA and what the warden and game rep told me on my hunt in the Greater Kruger and other hunts I’ve been on in SA on private fenced concessions. I don’t think “management” is synonymous with “non exportable,” at least in SA and the Greater Kruger or Open Area, which has free range management bulls available to hunt on quota, 36” bulls or less, hard bossed and at least 9 years or older are management bulls and fully exportable. A bull with a broken tip or broken horn would fit this criteria but interestingly enough, a “scrum cap” cannot be taken in the Greater Kruger, it’s their rules, I asked.
Various other fenced concessions in SA that include various game reserves and Big 5 reserves offer “management” bull hunts and the outfitter determines what is considered management, usually an older hard bossed non trophy bull that is 36”-37” or less. Whether your are hunting free range or a fenced concession, if hunting a management bull you have to be prepared to wave goodbye to a trophy bull you may come across!
I think the Greater Kruger would be an excellent place to hunt an exportable management bull, there are lots of buffalo there and reasonably priced.