On Mon, 27 Jun 2011 18:13:34 GMT, Baz wrote:

You might get away with making a mould and replicating with
GRP(fibreglass) you will have to google that.

Not sure that a pure GRP construction would be strong enough but I
guess you could put in metal strenthing members and bit where things
pass through be a right faff though.

Assuming that what is left is still strong enough to support the bits
why not give it good clean and wire brush, treat with a zinc loaded
paint and then line the inside with GRP(*) and layer it through the
holes.

(*) To keep the nasty corosive plant juices away from the steel.

--
Cheers
Dave.