Audiophiles, please navigate away from this page. It might make you cringe, hit random bystanders, etc.
That having said, some time ago I came into the possession of two simple bookshelf speaker cabinets by HECO, the Victa 200. Unfortunately one mysterious destructive force in my house took the life of one of the tweeters. (this mysterious destructive force has of course nothing to do whatsoever with a button-crazy two year old which happens to live in the same house). Anyway..
I couldn’t find an address selling spares, the original speaker cabinets were quite cheap, but only sold in pairs. The only solution: find some tweeter that roughly matches size and specs of the previous one, and do a replacement.
Being somewhat limited in suppliers, I bought a monacor DT75/8 which has the same cone diameter as the original HECO (only power specs and magnet size are very different)
I used a lot of hot-melt glue, jigsaw and file to make the cabinet useable again. Although the process looks bad and ugly, the sound is much better (compared with no tweeter at all) and even optically you can hardly tell the difference…