Hi Eidriana, when you completed your course to satisfy the mandatory requirements, did you receive the material that goes along with it? This usually is the case, and the material that most training providers give their students is usually helpful in later exam prep. If you have lost this, could you perhaps reach out to them and ask for it?
Failing this, I am afraid I do not know of too many other options.
Either you register for a new course and obtain all the updated materials (but this will involve a fee, of course). Or you refer to the source books - but this could be very time consuming and inefficient time-wise.