Thanks all, I've ordered some silicone hoses and a couple of
15-8-15 reducing T's from AutoSiliconeHoses.com to get me running.
I found the original NORMA PLAST TRS 15-8-15 reducing T's but
I had a look at the spec sheet for NORMA T's and see they're
only rated to 80 degrees for continuous operation.
That is a bit scary to me, considering it could have wrecked the
engine.
Simon, the two fittings that I'm looking to replace are the
plastic 16mm T in front of coolant header and the plastic
15-8-15 reducing T next to it, I also think this should be
a 16-8-16 to avoid over tightening.