"Matty F" wrote in message
...
On Jul 3, 12:23 am, "Tim Downie" wrote:

But I'm not making a ball, I just want a metal covered domed top to the
post, a hemisphere.

I have a collection of chrome plated copper teapots that I bought for
a couple of dollars each, since people don't like using copper teapots
any more. Perhaps you can find something like that in junkshops. Or
copper ornaments that you can chop up.

He needs an old hot water cylinder, lots of copper sheet.
They can be found at scrap yards or where new combi-boilers are being
fitted.