If you can't source the correct driver from KEF, you may not have many options. There are many different types of the Uni-Q driver. You may have to buy complete replacement units. Call KEF again and inquire about the cost of replacement units. I would also talk to someone in tech help and see if you could use drivers from one of the other cheaper loudspeaker systems and replace the pair with those. Finding someone to repair the Uni-Q driver might be quite difficult or impossible.
Has anyone lost a KEF tweeter?
Wednesday I had a beautiful sounding system and Thursday morning the right side was so much louder and the left side was muddy sounding. I switched interconnects. I switched speaker cables. Then I pulled out a test disk and played a 10khz tone. Yep the tweeter in my left KEF Reference 5 speaker isn’t working. I called KEF USA and they told me to call a couple of places for service. The first place hasn’t worked on speakers in 4 years and I’m not sure the second place had even heard of KEF. One thing the guy from KEF said, was that all the speaker cables are soldered on the Reference 5’s. I checked the wires on the back plate and they were fine. So it either the crossover (s) or the tweeter part of the UniQ.
Grrr!