You might try Garhauer Marine. They have stantions in there catalog that look close.

http://garhauermarine.com/catalog_process.cfm?cid=44

:: The stanchions on my boat are in need of replacement -
:: two of them were bent, and none of the four really
:: matched each other anyway. Is the original stanchion
:: just a straight tube with some type of ring at the top
:: that just goes directly into the (interior) glassed-in
:: receptacle at the deck level? A couple of the stanchions
:: on my boat had a diagonal strut that went from the deck
:: to part way up the main piece. The diagonal strut didn't
:: seem to provide improved strength, as one tube was bent
:: at the upper attachment point for the strut.
::
:: If there is someone who wouldn't mind my looking at
:: their boat so that I could take some photos, I'd greatly
:: appreciate it. This coming weekend isn't good for me,
:: but perhaps next?
::
:: Thanks,

:: Maryann