Sometimes it takes two weeks or a few days past two weeks for some of these queens to start laying. I don't know the actual cause. I used to blam it on banking, but I experimented with that and banked some queens for several months and when I put them in a hive they started laying in a few days, so I don't know the actual cause, but I have seen them take as long as a few days past two weeks to start to lay. The ones raising a queen, I'd let them finish. Maybe even steal one of those cells for the queenless one...
by the time you find a queen, buy her, get her shipped, get her introduced, it will take almost as long and the quality will not imporove over what you got last time...