Okay, again your simple reply reveals my ignorance. I guess I don't really have good reason to believe the replacements I ordered are a match for the originals. I based my decision on the size (6.5"), and ordered the best of three choices offered at Simply Speakers for replacement woofers. I knew enough to order 8 ohm replacements, as the originals were 8 ohm. What other spec's should I have ensured matched.
The problem is that all drivers are very different. They have different Thiel/Small parameters and acoustic responses. Of concern to you is the sensitivity and roll off of the drivers. The chance of the woofers your ordered having the same sensitivity as the originals are remote. So the balance of woofer and tweeter will be upset. In addition the impedance curve and the acoustic response of the drivers will almost certainly be very different. This means that the crossover will work very differently with the new woofers.
If you just want noise in the home then using any old driver will work, assuming it will fit. You almost certainly will have to modify the enclosure.
If you want decent sound, you have to repair your woofers or start from scratch. To me those speakers seem like really rough units. Using Polystyrene is a very bad idea except for woofers and then they need to be crossed at 400 Hz. That is too low to cross to a tweeter.
The only polystyrene driver that was any good is the redoubtable KEF 139 woofer. That is a good driver, but you have to make sure it is at least 24 db down by 900 Hz or there is Hell to pay. So that means it is only any good as part of a three way speaker system.
I have not heard your drivers so somehow they might have got away with it. There are a couple of drivers that I have had experience with, an old mid that Wharfedale put out and a midwoofer by Leak. Not good. In addition Polystyrene degrades over time. KEF solved this by cladding the Polystyrene is stout aluminum foil. They hold up well.
If you want to salvage these replace the surrounds on a couple of drivers and see if you like them. If not the recycling center is the place where they belong. Unless these units are something special I would not be going to the trouble of salvaging them knowing that it would likely not be the last time I had the hassle of refoaming 10 drivers. But that is up to you.