Go to any good tabaco shop and look for cheap cigar torch lighters. They will look something like this.

http://cgi.ebay.com/TORCH-CIGAR-LIGH...-/170601938536

They are a few bucks and have a true butane torch flame. They burn just as hot and strong as a $30 Calibri Survival lighter for 10% of the price. Refillable with a butane bottle, so you can test and then fill and pack in your BOB. Every BOB should have one or two of these along with other fire starters.