Umm, interesting, but I'm not really sure what need these would fulfil. At least in the UK, Brian Primmer sells stainless steel replacements for the plastic-chrome inserts; they work really well; I have them on two cars, so far.
This is perhaps a good moment to mention that the chrome inserts for front bumpers are still available from Citroen at a pretty reasonable price.
Part number 7452 F4 for the S2 version with cut-outs for headlight washers, £34.94 inc VAT
Part number 7452 F3 for the S2 version with without cut-outs for headlight washers, £35.62 inc VAT
It won't be long now until the supply dries up. Xantia stuff is being deleted fast these days. I had it in mind to put in a big order for essentials knowing I'd need them in the future -
a pair of strut tops, the estate tailgate bumper section, the main "octopus" etc
At the beginning of this year, all were showing as available. Now they're all "NFP", ie you can't buy them from Citroen any more.