for the cr.B,cr.B,st.B block string you mentioned for King, I think with most characters in the game, if you just do a normal forward jump and j.D it will cross up. the hyperhop probably only works on really small characters (like chin) and possibly some of the bigger characters if they are crouching.
for EX Kyo, although I'm not 100% sure, I would be surprised if you couldn't do cr.B,cr.B,cr.A as a block string and then cross over with hyperhop j.B. I do know for sure that Kyo's j.B is pretty good at crossing up, so if any of his moves would do it in that spot, that'd be it