I have a set of Norman Labs Sevens and am wondering if anyone has suggestions for replacemenrt tweeters? They came with Radio Shack 40-1026 woofers that looked brand new but the foam surrounds had disintegrated, so I refoamed them. Have ordered Parts Express 5.1 caps & binding posts as suggested in another post, but am curious if a replacement tweeter is out there. They each have two tweeters on a surface mounted block. Both tweeters look identical from the front, but I'm a little leery of taking them out without a fall back plan. At least one tweeter seems to be scratchy. Suggestions?