The burna dance

Since Wartrakks look like they were designed by a blind person and sell for $35 a pop I've decided to make my own. I've got the body mostly down (sans a good driver model) but as these are Skorchas I need a good, preferably obnoxiously large flame weapon.

Whose got some good suggestions for possible flame turrets? I'm open to good models to loot or alternative model suppliers to purchase.