Found it! HOOK Topper

[astyy]

Anybody happen to have one of these they'd sell else I'll get one of the repro ones from the US on eBay.

Thanks

 

[astyy]

I opted for a Classic Arcades repro from the US. Was concerned that they don't come with brackets which could be a faff but turns out 1 1/2" corner braces (from £ shop!) coupled with M4 10mm SS socket button/nyloc fasteners make a neat job using the pre-drilled holes