UK is only country at present to require CRM Instructors to be accredited and follow an approved UK CAA course.
Europe and rest of world do not seem to require such standardisation yet !!.
I understand that EASA/Jar will require CRMI and CRMI Examiners to be fully accredited under new rules next year similar to that in UK.
For good CRMI Core courses in UK look at Flight International magazine advertising pages under tuition.
Several courses advertised and all are approved by the UK CAA.
Any further information contact me off line.