450 uF Capacitor on a vintage Jamo?????

I agree. The voice coil former looks beyond repair.

It has to be perfectly round or it won't fit cleanly and precisely in the narrow magnet gap.

What sources for tweeters are available to you locally?

I'll need to explore sources.

Speaker repair businesses, trash and treasure, Gumtree, and the like.

The Monacor DT 75/8 Tweeters would be perfect but the cost involved for these and the crossovers make the Diamond 3's a write off.

I'll maybe stash them and wait for parts to come up or break them up and sell the parts.

thanks for all your help.
 
According to the wharfdale specs, the tweeter is a 19mm dome and it seems to look a bit like a Vifa D19, but with a different mounting plate.

You can get them from parts express in the US, or from here
D19TD05-08 Peerless by Tymphany | Audio Products | DigiKey

cheers, Arthur.

Thanks Arthur.

Well worth knowing the option.

Alas at $72 plus shipping and the mounting plate mis match makes the Monacors from England more viable at 25 Pounds plus shipping.

Might have to sit on these.

With the high cost of procuring drivers I might be better off selling the Wharfedale Woofers for parts and the boxes for someone looking to build a DIY.

A shame though.

They're not too bad sounding, even without one of the tweeter.
And with potential for further improvement via a crossover restoration.