You might be in luck if those Paradigm models use OEM-supplied tweeters. It was around the mid-90s that Paradigm started making the majority of their tweeters themselves, and obtaining replacements directly from Paradigm might be more expensive than just hunting down a set of used speakers and cannibalizing them for parts. But, before that time Paradigm bought their tweeters from OEM suppliers that are readily available to end users.

Might want to check AudioAsylum or one of the DIY sites and get a reference on the tweeters that Paradigm used for your particular model. At one point on this board, we did have a discussion on this topic, but that dates back to the old AR board and there's no easy to search for the topic.

BTW, how are you sure that the tweeter itself is dead? Often times an inactive driver might have more of an issue with a bad solder or circuit on the crossover.