I am Ron of ebay's finerthings4all. We carry replacement foam for AL - III's.
The 1/4" acoustic foam is cut to fit at 3 1/2" x 72" and will restore your AL - III's to their original grandeur.
Jump over to ebay to check out our listing, testimonials, and feedback. Please feel welcome to contact us there or here with any questions.
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http://cgi.ebay.com/Carver-AL-III-Repla ... 0225633521