Tannoy Revolution Signature DC6T/ Tweeter

I have a pair of Tannoy Signature DC6T and both tweeters are broken. The unfortunate thing is that, Tannoy don't give you the chance to replace just the tweeters. Instead you have to replace the complete Dual concentric speaker, which is about 430 GBP plus delivery and customs. I have the speakers 6 years and I am a moderate listener. I am a little disappointed about the quality. Before I had a pair of canton Fonum 600 nearly 20 years with a lot of partying and they are still going.
I found some tweeters (7900 683) that are used in the DC1 and DC2 and some other speakers where they use 6,5 dual concentric drives for about 140 GBP incl. shipping. I think i take the chance.