Oog. Sorry to hear about that... did all of them get damaged at once? If
you live in an area frequented by lightning, the best thing to do is unplug
the sets in advance. That's the best surge protection there is, and it's
free.

Lightning can damage/destroy all manner of things in a set, and even if you
do manage to find and replace the troublesome components, there's no
guarantee that something else inside that was only weakened might not go out
later. It's just not worth it.

If you're insured, you might consider having a qualified TV technician
verify the damage and have your insurance company get you some new sets.