Yes, "DS Game Forwarder Pack (Supercard DSTWO)".
The DSTWO(+) isn't a DSTT clone, btw.
Was meaning DS Two not DSTT. Bad acronyonmisation.
Anyway, tl;dr - After reloading EOS realised I'm an idiot and the card was broken anyway. :\. Anyway, here's to me hoping we get redirection out of TWL for Stargate (or Stargate fixes their DS mode not working on CFW). Or I try and actually track down a flashcard in stock :\.
Thanks for your help.