muddfish

hi just bought ar3a of the Bay.. its a later model with a high serial number 100,XXX everything looks original for the tweeter and mids for what i believe to be made in the early 70s. But the woofer is a poly cone vs plastic and after researching I believe it is from a ar50 Connoisseur speakers or ar tsw-610. should i go hunt and find the original ones or are these woofer similar enough too keep ?