I've recently bought some of these off ebay from two different sellers.
I can thoroughly recomend barrie911 - his panels have a finish that is very close to that of the original panels - if I was being picky I'd say that they lack the slightly grainy finish of the originals - but your nose has to be about 6 inches away from them to tell! Not cheap at £20 but worth it if changing the panel will bring the item back to near mint.
I would not recomend paul.k2007 - his panels appear to be be painted with some sort of silver metalic piant - they aren't even lacqured and scratch very easily. They don't look anything like the original panels. They're a lot cheaper (£10) and they look it!
Cheers
Nigel