Diving Instructors needed!!!

Hi all,

I am organising a diving exbed to newquay and need an instructor/Advice. I will be taking a load of lads down to do the open water cse but am unsure what size the groups need to be? Is it possible to take your own instructor down with you and they then run the cse? If so what happens about kit hire/pool hire/boat hire etc??
If there is anyone out there willing to come down and run this cse then please get in touch. I am looking at mid may (it just so happens to be the 'Ripgirl' bodyboarding championships in mid may aswell).