what type of sicilian do you use? you might be able to get accelerated dragon against 1.d4 after 1.d4 g6 2. c4 Bg7 3. Nf3(or Nc3) c5..
now not moveing the d dawn will transpose to accelerated dragon, english or Maroczy (which should all be part of your opening if you use accelerated dragon..) after cxd4. white can play 4.d5 and you can learn a benoni, if white plays 4.dxc5 the don't get any advantage (qa5+ then qxd5 or even na6 then nxc5 if white had played Nc3 eariler).
I'm starting to get better using the sicilian (it's harder to master than most other openings I think) and I'm looking for sharp alternatives for black, both for e4 and something to answer d4 besides the king's indian defense or the nimzo one. Perhaps some variations of these openings could be nice, but I'm looking for something sharp, and perhaps a bit unusual to destabilise the opponent... if you have any suggestion.