Speak to Dave 'The Cove' Covey. He's an ex-forces guy living and working in the diving industry out there - and specialising in hyperbaric chamber treatment, so not exacly shabby. He's an oppo of Paul Oliver off these boards (in fact, didn't you once enjoy a 'Section 69' together Paul?? ;-). In fact, if memory serves, Dave might actually reside in KS - result!
You can contact him at the following:
http://www.bsacforum.co.uk/cgi-bin....20covey
I've not dived in Thailand, although I did take Fiona to Pattiya for a week after we'd 'done' Bang Kok and Singapore. Can't say I was overly impressed by Pattiya - especially the cohorts of flabby middle-aged white European guys pleasuring themselves with the local children and 'lady-boys'. Grubby gaff as well. I do hope KS is a better option. Good luck.