Re a matrix that will shows the release names (eg RU5, MR4 MP2, MR4 MP1, MR4 MP1a, etc) and the corresponding build numbers,
the old link does not work. This is the current URL to the KB page:
Symantec Endpoint Protection Client and Manager Version List
http://www.symantec.com/business/support/index?page=content&id=TECH105816&key=55357&actp=LIST
Here you have all the SEP version released:
https://www-secure.symantec.com/connect/articles/what-are-symantec-endpoint-protection-sep-versions-released-officially