I have a chimney hinge ( the cast ring at the base of the chimney ) for a large portable that came when I bought Marshall 82333 a few years back. It is for a 12.75" dia chimney so a fairly large engine.
It does have a crack but could be repaired or used as a pattern.
available for cost of postage.
This could be from one of the other engines brought back from Chile or Portugal around 2004
http://www.tractiontalkforum.com/sho...ighlight=82333
https://www.tractiontalkforum.com/sh...ighlight=82333
can send photos if interested