Don I've got a '49 , and been wondering the same thing....
I was thinking of rolling the edges over real nice and neat, and making it some what round & buying one something like this ( pix) " may be a little much but the hole left after the grill is gone may be to tall 2 ? I think it'd have to have a really tuFF stance to pull it off .
"I'll photo shop one later tonight"

you have any more pixs of your progress ?