H28.5 owner Jay Girzzell recently exchanged some email with Hutton-Arco in Australia and is in the process of buying some replacement parts from them for his Maxwell 21-B. They probably have other Maxwell parts, as well. Here is the contact data:

From: Allen Hutton @ Australian Yacht winch Co
Subject: Re: Maxwell 2-Speed
21 B Allen Hutton Australian Yacht winch (Sales) Pty. Ltd.
4 Narang Place St Marys
N.S.W. 2760, Australia
Phone +61296232448
Fax +61296232264
Mobile +61412864484