NEED HELP: Can't identify Compression horn tweeter

I picked up a pair of speakers and one of the compression tweeters VC seems to be burning out, poor sound, pulled it apart and definatly needs a new diaphragm/voice coil, but no idea what driver it is.

Photos are available by clicking the links below.
Any help is extremely appreciated. I live in australia and finding it very hard to find parts also so any assistance there I will be forever thankful.

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