Proving harder than I thought this Mick.
I found 3 quite easily, one has a part of the oil pump wall broken, clearly a chain breakage, another has a very small section at the top of the oil pump wall missing, that may have been me fitting an oil pressure gauge many moons ago and that's how the pipe went through. The last one looked reasonable, I always clean them and inspect closely as I clean for damage. The alloy has some corrosion pitting and one area has what looks to be a stone strike. I could try and clean all these up to some extent but it would depend on what your were thinking of doing with it, powder coating would cover it pretty well for instance.
If you were thinking of polishing it then there's a lot of work to be done.
I should have at least 2 more around somewhere but I need to ensure that I have a decent one for my engine.
Let me know.