I have one which iirc fits this diagram. It's new old stock from Nathan ... umm... can't recall his family name, but he ran Fiat500UK or some such and you may recall offered about half a dozen recon a/c engines on here about a year ago... gosh, sorry my memory's so bad, but it'll come back to me when I have my tablets

Anyway, I got his last clutch of coils so if this is the type you want let me know and I'll dig out the details and let you know the price.