Great speaker and should be restored, reminded me of much later Thiel 3.6 in their sound, not quite as low in the low bass but just as fast and punchy, but they need an amp with good current as they were hard to drive.
Bass units rare (CTS) (Chicago Telephone Supply) would probably need the foam roll surrounds done, get the right size and don’t go for rubber.
The midrange units (Peerless K040) were part of the magic and are as rare as hens teeth, hope yours can be repaired.
Tweeter (Celestion HF2000) not so bad to get or repair.
Once working these can be modd’ed to really sing, if the mid and treble wire wound pot controls are cleaned up (they go green with tarnish) then set to your sound balance liking, then measured (series and shunt) of both pots and replaced with fixed power resistors to mimic the pots, and pots taken out of circuit.
Here in Australia a working pair can still fetch $2k and the 401C (chrome) up to $3K and these prices go up every year.