Any differences in sound? You'll have to lift the whole driver out. It helps to remove the grill in the back to push the driver out. The driver is leaky because they used felt between that 2nd plastic ring (in your pics) and the magnets.
I think Negura is right. By the time I realized it had a quarter foam, it was mostly disintegrated by then. Will eventually happen so you have to fuzzor anyway. Negura an I are working on a new fuzzor to be used with vegans.