do they make strobe lights kits for models?

You might try looking in the Walther's model railroad catalogs, as I seem to recall that they had some items in that area. There is something called a "Mars" lite that is essentially an oscillating white lite used on locomotives, and I've also seen kits for lighting up cars that you have on the layout. Unfortunately, I do not have any specific advice on which companies might be able to help you out.

If you mean lighted (as opposed to just the light-bar fixtures), try:

http://www.code3customs.com/lights.shtml
http://www.miniatronics.com
http://www.ramrcandramtrack.com

Or something like this?

http://www.chimneyvilledecals.com/1liflkit.html

You could also try Radio Shack or some other electronics supply shop. They have blinking LEDs in various colors. Or tiny light bulbs and some simple on-off circuits you could solder up to make blinking/strobe lights. It is quite easy to do basic electronics. They have kits too.