i have been looking at how to keep the van warn on them cold nights and i have came up with this have a look and see what you think
http://www.ebay.co.uk/itm/150803980223?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
http://www.ebay.co.uk/itm/150803980223?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649