At some stage someone put in two horrible looking courtesy light door switches and I've been trying to find something suitable for ages.
The original Ceam ones are unobtainable at anything remotely like a reasonable price (I think the Ferrari 250 uses them, which might explain it!). I finally found ones for a Fiat X19 that look so much better that the ones I had, and whilst they're not OE for the Fulvia they do the job well and look good to me. UK Eurosport supplied of them very promptly for £4.45 each + postage.
So, if your door switches need replacing these seem a good option. The only thing is that the existing hole will need to be drilled out to 12.5mm and a small hole for the retaining screw would usually be needed (whoever did mine had already drilled such a hole).