I'm not sure, because as I said I tried looking here, the DAZ store, RunTimeDNA and ShareCG. There is absolutely nothing to be found regarding any ballet items for males. Though, I will agree with you on the idea that most of this may be Second Skin. Still, whether these are authentic or composed using other clothing and material alteration I would pay whatever would be nessesery to have a decent dancewear for the project I'm working on.