I believe the marang is more cold sensitive, so, you're best chance might be a jack instead. But young trees, are also cold sensitive too, but mature, well established trees, can with stand down to freezing, a few hours. Maybe some limb die backs, frost burns or the tree can be burn all the way down to the ground and if the roots are big and strong, they might grow back. Seedlings are known, to be more cold hardy, than grafted trees, so try to get a bunch of good seeds from a good variety, crunchy flesh is prefer by most. There is also a soft/mushy flesh type, people says, that type makes them gag. So, get a bunch of seeds, grow them out, let them over winter outside w/o protection(1+year old), the ones left with min damage, should prove to be a bit more cold hardy, than the ones, that did die or didn't die, but suffer major damage.
BTW, TR Hovey, doesn't produce true seeds or if any. I could be wrong though, I got mine as tissue culture from wellspringgardens.org, from FL. It was cheap. Could have grown bigger, if they had a better sunnier location, but they're in a mostly shaded spot. Only, when, the sun is over head, do they get most of their sun light.