Ejvic,
I hope that you did indeed buy the F version (not A version) of the tweeter that I recommended.... I've been researching the Hales info extensively. I have a photo of the crossover and I'm sorry to say now, but I have found a replacement diaphragm for the tweeter....
Here is the diaphragm: http://www.madisoundspeakerstore.com/scanspeak-voice-coils/scanspeak-voice-coil-d3004/
The good news is that the Dayton RS-28F-4 is still a reasonable replacement, it should cross well and it will be down about 1.5 DB from the original tweeter, You may love it you may want to change a resistor... to correct. Or, Scan Speak now owns Vifa, this is supposed to be the correct diaphragm...
Don't say "now you tell me" took a lot of time to find this info. Tim
The