I need lid ideas for a barrel

[smoa]

I have a 55 gallon SS barrel that is being converted into a boil kettle. I still need to dig up a lid of some sort. Would it be oaky to use a galvanized trash can lid? I can't really think of anything else at the moment that would work. The opening is just under 22" in diameter.

 

[Schnitzengiggle]

How about something like this?

http://www.google.com/products/cata...=X&ei=qTOjTcj4GoL0swPjpIj5DA&ved=0CEEQ8wIwAw#

or

http://update-international.com/jpg_300x300/aptc-120hd.html, 21.5"