"If" you found one you "could" modify it with modern components. But why? I would use the Fair Warning as is for nostalgic reasons. Then integrate a modern day one that will detect K and KA. Laser is a nice bit of false security, because by the time your detector gives you a laser warning you are dead in the water. I use a Valentine one and drive a freeway to work on hour everyday. Its saved my ass on KA, however I just got hit with laser the other day, lucky I wasn't speeding. Within time all law enforcement will update to laser, its just expensive right now.