Is this a rare-ish find? Just I cannot find any other Cinder Cone online in this model and colour etc
Well because it's a mid-season model there will be fewer of them than the stock gold version. Personally I prefer that colour, but this is also good, especially the contrast on the decals. It's not rare though in the grand scheme of things.
It doesn't need a re-spray and sourcing decals that are exactly the right size and shape is almost impossible. Unless you really don't like it, I'd recomend you keep it as is. Give it a full strip down, clean and lube, remove that nonsense on the bar, treat it to a proper saddle, think about some nicer v's or canti's and ride her.