I have yet to see any other brand on the black market but Serostim. It's from a lab that is as large as any of the others, and it's the only version that is specifically marketed for HRT and anti-wasting, so that's Good enough for me.
If $$$ wasn't an option, I'd get some Norditropin. Viking GH. Unfortunatly I've yet to see it for less than 10$ an IU with a script.