If your not fussy about identical Ref 3a drivers, you may be able to pick up suitable replacements from company's such as Parts Express or Crutchfield. If the cabinets are finished in a good veneer or lacquer, I would certainly look into purchasing OEM drivers directly from Ref 3a. They (Ref 3a. ) has stopped offering (from what I have seen on their website) the nice finishes and are replaced by an industrial looking grey Nextel. Perhaps good for defraction, but (IMHO) ugly as a knu's hoof. Owners of the Ref 3a speakers with the premium finishes should consider themselves fortunate. They had just started to offer the DeCapo in the high gloss for the veneer finish... Just stunning to look at.
Good luck... .
Good luck... .