I got mine from here: http://strobeguy.safeshopper.com/80/2425.htm?688 I emailed the guy to ask which was better, the Whelen TIR3 or the Nova BULL, and he replied the next morning (saying they were both excellent and that the Nova had more flashing modes) and the order was shipped right away, so +1 for that outfit. There are some more suppliers listed here, the prices are all pretty close: http://www.strobe.com/buy.asp

And then you need a battery of some kind. It'll run on a 9.6-volt RC car battery if you happen to have one. If I buy a new battery & charger, I'm going to get the 11.1-volt Li-ion 4000mAh battery/charger kit from BatterySpace: http://www.batteryspace.com/index.as...OD&ProdID=1996 But I've spent my toy budget for this month