Very few American hop farms ship to SA because we are in the Southern Hemisphere. You also need a importers license. The license is cheap, but it requires that the company sending the items to you have a certificate that the hops is clean (not infected with any bugs from the importers list).
You might want to try NZ or Australia.
I was going to get a few ...
It's generally not recommended to import due to diseases. However, I would suggest reaching out to SABmiller and ask if you can get a few rhizomes next time they do their root "pruning" (I can't think of the correct term.)
From what I've heard they're very homebrewer friendly.
Medusa is just a commercialized named for multihead. You can get them, as well as Canadian Red Vine (currently sold-out) from Great Lakes Hops.