Chris , sorry only just seen this , the nearest match I found was LEAF GREEN.
George Shead at Villiersparts did have some new(non original made to pattern) ones recently , I have a few of them but as per usual , they are either badly dented or corroded, they’re not overly difficult to source , and frequently appear on that site.
I have quite a number of engine spares if you find yourself wanting any let me know.