Stanchion bases

I have been hit at night by a 13m yacht who broke its moorings and one of my stanchion bases has fractured, amongst other traumatic things. Has anyone any ideas where to find these items? I have found new bronze or polished gunmetal ones online , but they probably won’t be an exact fit, eg:

http://www.alabordage.fr/en/deck/299-bronze-above-deck-stanchion-base.html

http://www.sentinelboats.co.za/bronze-stanchions.html

The original bases appear to be triangular, 65 mm high, approx 92mm each side of the triangle base, I imagine they were chromed bronze originally but have reverted to bronze!

Any ideas or anyone with a spare one I’d be happy to buy it from you.

Thanks

Duncan