I've seen this discussion before, maybe in the Winamp forums. Someone says it's there, and someone says it's not. Back and forth. Attached is my screenshot (comparable to yours) which shows that it can be there. I suspect it is not there by default and I suspect the other tags you mentioned are also not shown by default. So that means there is something I did and you could do as well, that causes it to appear in the drop-down menus. Sorry, but I can't be specific about what is that "something". 
Maybe this thread will help. And DetlevD really knows his way around Mp3Tag, so follow his examples here and anywhere else.
Good luck,
Jim