Hi Bill,
         The Beeworks in Canada has apail warming device called "The Melt
Belt".This is pretty inexpensive($14.75)and uses about the same electricity
as a lightbulb.
The address is:   [log in to unmask]
Website:   www.muskoka.net/~beeworks/
Hope this is helpfull,
 
Garry Libby
Boston,MA   USA
[log in to unmask]