What are my best options over there?

Thanks for that information. I still need repair parts source information for the U.S. please.

My Red Line speakers are Type 8510 and I see (and hear) that the foam surrounds have disintegrated. I have done the repair on Bose speakers before and I realize that these RLs are much more complex and precise. I request advice on this refurbishment and a best U.S. source for the parts. Thank you!