Always good to get pre screened ... Although it takes me about 5-10 minutes to screen , but if I am actually available last minute can be a whole other story

Another option is to ask the lady that is cancelling on you to refer one of her friends. Of course this can only work if the lady calls to cancel.
Actually you shouldn't even have to ask , the lady should offer to help you find replacment.
I always do , although very rarely do I ever cancel.

Let's hope all your plan A's work out.
xoxo CindySpice

thanks for the help. All great ideas. I wouldn't want to waste a lady's time and get pre-screened when the chances are that plan A goes through and then never meet with B.