Looking at that again it's WD823 £59.50 Theres a couple of bits marked as 816.
I've been quoted £360 inc vat (part only not fitted) that sounds a bit steep to me.
Is it only the Morgan factory that supplies these?

Richard

1983 Plus 8 (on carbs)
1975 Land Rover 109" full tilt
1989 Caterham
1999 Honda Fireblade