I picked 5 speakers up from Herbs at Carlisle last year.
I found the 4X10 to be more of a universal speaker, and I had to cut some corners to get it to fit right. Really expected it to fit better.
The 3 1/2" round speakers fit, but I think I had to make some minor adjustments to get one speaker to fit. If I recall, there was an interference with the dash frame and the magnet.
The rear 6X 9" fit perfectly.
I looked far and wide, but couldn't find anything better. I think the best option would be to re-cone the originals. But I read some negative experience on that front as well.
Seems you just can't beat NOS.