If you are still in MF frustrations then I have something that you might find interesting. Recently I pick up in UK a pair of Vitavox S3 drivers. They out to be with original metal cones. I do not need them but the price was too good to let it pass. I was considering to put it to my storage, adding them to the of my large grave yard collection (a big storage with all imaginable loudspeaker crap) but then I figure that if you wish I might let you to play with before they die in my “audio repository”.
The speakers now in the box in my trunk (I did not open the box up as I got it from UPS) and if you wish I just dump them to post office. Be advised that it might be more pain on ass for you then you expects. The speakers are 50 year old and most likely need work. They are 1.5” and you would need to make up some kind of temporally mounting arrangement. The have cone at the different spot then you current drivers, so you will straggle with time-alignment. They are with ceramic magnets- so you might not like your current amp with those speakers, a SS SE amp in class A would be more desirable for them. Anyhow, you might have a lot of work to do just to try it, I am not sure that it is what you would like.
Anyhow, if you are bored and would like to have some audio “excitement” then I can send them to you for a couple month…
"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche