first of all you there are 2 courses available for the ep certification :
check out the links below :
now this are the official certification published by the sap itself one gives you development professional accolade and the other ranks you with techincal professional.
you can opt for the any based on your skill set and experience. need to consult any sap authorised centre for the same.
also once you enroll for the course you will get the updated materials and all from the centre itself which will be given by the sap.
i hope this will definitely solve your problems.
thanks & regards,