I have a used (worked great before being removed) Whelen 180 watt, 8 head power supply that can also control an arrow stick. There are no connectors for the power supply (takes standard strobe connections) and the power connectors are easily obtained. These are big, bad boy power supplies (normally we see 60 watt or 90 watt power supplies in our vehicles). They are $687.00 brand new. $220.00 Shipped to CONUS.

I will inlude a wiring diagram with them

Here is a link that shows information and a photo;

http://www.evpp.com/details.asp?prodid=ISP188&cat=21

Here is an advertisement on line:

Whelen ISP188 Strobe Power Supply


Options: ISP188 - 12 vdc ($642.99 USD) Quantity:

SKU: ISP188
$681.75 USD

180 watts, eight outlets. 12 or 24 vdc. Sixteen flash patterns with programmable configurations for DOT, Serial and UPS applications (less Diagnostic Indicator Kit)