Alan, couldn't you use a fuel line heater from an automotive diesel with a 12V transformer? A lot of WVO burners run it all winter thru their old Mercedes Benzes with a fuel line heater setup. There are some good sites where you could probably get the info you need on the parts. There are a few WVO burners on this site: http://www.mercedesshop.com/shopforum/forumdisplay.php?f=15 There are some other sites devoted to the subject.