replacement diaphram & VC for tweeter?

[mondogenerator]

i have some 'el chepo mega cheapo' tweeters that im seeking to find replacement domes for.

i havent as yet blown them but i am planning a small franken-tweeter experiment.

the chassis' i have are the fairly standard 25mm VC/dome, with the dome,VC & wiring attached to a bezel which sits between the magnet and faceplate which is the again, fairly standard roughly 4" diameter type.

I am seeking a source of replacement domes that may fill this requirement, once i have the magnetic gap height etc measured out. Any manufacturer, any dome material, im not fussy.

Any help the experts out there may have would be welcome.

Many thanks.