612 Headlight - OEM Manufacturer

For a prospective 612 buyer in the UK there's a much bigger choice of 612 cars in Europe (France, Germany Italy Spain), than in the UK. Currently, about eighty 612 cars on offer in Europe, and just twelve in the UK. They are LHD of course, but not such a disadvantage if you plan to drive in Europe frequently. European cars are cheaper than in the UK also, because the Euro is weak right now. The fly in the ointment is that the LHD car will need RHD headlights to pass the UK's vehicle test (MOT) needed for registration. Used 612 RHD headlights are as rare as hen's teeth. New, they are about GBP 1700 a side. Which begins to take the edge off buying the car in Europe in the first place. So I am trying to find out if it is practical to modify 612 headlight assemblies by changing out the LHD BiXenon projector for a RHD projector- either an original OEM projector assembly or an aftermarket projector. This modification is popular and easy with most high-end BMW and Audi cars. But if the 612 projector is totally integral (glued, welded) with the big scooped main 612 headlight assembly, the idea is a non-starter.
Does anyone know who makes the 612 headlight assemblies (the 599 are similar)? The BiXenon ballast OEM manufacturer is Osram - but did they make the projector assembly also?
Any left field ideas on managing a 612 LHD -RHD headlight conversion would be welcome

 

Momiji is right - common sense is to buy a RHD car to use in the UK. LHD cars are hard to sell here. There are two advertised presently, and they have been sitting unsold for many months (though one is Rosso Corsa - a very wrong colour for a 612) . However there really are some very good 612 prices in Europe now- for example 2008 OTO cars in Paris, Nice and Madrid, with lowish mileage, all priced around 97K Euros, which is GBP 70K or USD 109K at current exchange rates. For comparison the lowest priced 612 OTO in the UK today (RHD) is asking GBP 110K. So, leaving aside headlight issues the European cars are a good deal.
There are also plenty of 2004 - 2006 cars for sale with relatively high mileage (50-80K Km / 30-50K miles) especially in Germany. The majority are colour Nero. This points to substantial earlier business use of these cars, bought as a faster alternative to big BMWs, Mercs and Audis for driving between Munich and Berlin, Paris and Lyon, or Madrid and Barcelona, faster than flying or the train. And this pattern is confirmed by business colleagues in Frankfurt. It's a pattern of use for 612s that is not seen in the UK or the US (where distances are bigger and flying is cheap). But what will happen to these older high mileage cars? They do not seem to be selling well now, and several are being sold by ordinary local second hand car dealers, not Ferrari dealers or luxury car specialists. They will probably become multiple owner, poorly serviced cars to avoid in the future.
But I am still interested in any info out there on 612 Headlights, and their construction!

 

Thanks to all for useful information and help: Makuono, momiji and Hans. I hadn't thought of Valeo, had imagined Bosch, Hella or Marelli. That's good - I can chase down the actual Valeo projector used in the 612. Part of the high cost of new 612 lights comes from the colour coding, but the Canadian eBay lights can be painted to match quite easily. Hans' idea is sharp - there are two friendly dealers I know who would do that for me.
I will post what I find out at Valeo, for reference.