Phone the boats direct - Try Richie in Deepblue and Glen on the Maid
Maggie.

 http://www.deepbluediving.org/
 http://www.maidmaggie.com/

There are a few others too, but I don't know of a shuttle service
off-hand.   Richie is often able to give you pointers to other dive
boats who might help if he's fully booked.

(You might also want to try Looe (Looe Divers?) - theres a
place there runs a fast RIB - only 10 minutes to the Skylla & JEL)

Gordon