Okay, I stand corrected, although I'm skeptical about the level of indigenous systems/work, I'd imagine that those existing J-11Bs are Russian airframes fitted with the Chinese stuff, that's far from 'pure' Chinese. That WS-10 is still not in production I think. But well, it's China, hard to get reliable info.
Anyway, I don't think they are serious about finding any customers and have little chance of getting orders, unless they want to sell to Iran or North Korea, but I doubt it. At least it won't affect Russian sales, because Chinese market consists generally of the ones Russia does not supply. It may be cheaper and therefore get some sales, but that wouldn't have been a market for the Russian Flanker then anyway.
Getting the WS-10 in full scale production so they can export the J-10 is a bigger priority than for the J-11B to steal the Flanker market.