I have had DFK on several visits with Cassidy from Paradise (546-5649).  24, slender maybe 110-115 lbs, long blonde hair, face is a cross between Sheryl Crow and Tom Petty (but it works - she's good looking).  Outstanding service provider.   I think that her willingness to provide DFK, though, depends on her rapport with the customer.  
Piper from Gems provides outstanding and energetic DFK, but she is a bit older (mid-30's) and a bit heavier, but still extremely pretty and also an outstanding SP.  She retired a while ago but I have heard that she is now out of retirement.  Gems is in the book.  Cassidy certainly has the more "bikini-worthy" body, though.