Your image did not display, but your description is enough to understand that you're referring to the hawse pipes. In case you're not aware, we are fortunate to have Bud Taplin assisting Westsail owners on part replacement. Bud may or may not have the bronze parts in stock, but he will be able to give you a lead on where to get new ones.

http://www.westsailparts.com/ServiceManual/index.php?chapter=C#C-01