if they are'nt dot approved, they are illegal. but i hear if you keep your parking lights on when johny law is tail'n you, you shouldn't get bothered. as long as you have the good bulbs that shine red and not pink.
and if the rest of your car isnt to raced out and such.
and if you do find those bulbs, let me know what type they are, cuz ive been looking my self.