Are you sure its the tweeter? Sometimes a bad recording can trick you into thinking you have a blown tweeter. Also, take the cable that runs to the left speaker and connect it to the right one. Then take the right speaker cable and put it on the left speaker. If the other tweeter now sounds blown, the problem is with something else.
As far as getting replacement tweeters, try your local dealer if you have one. If not, call Vienna and see what they say.
As far as getting replacement tweeters, try your local dealer if you have one. If not, call Vienna and see what they say.