I have spent hours trying to find reasonably priced, good condition, pairs of projector facelift headlights only to conclude that its a bit of a gamble. In the event you are purchasing some nicely refurbished sparkly headlights they will have lost there uv resistance and are likely to need regular maintenance. I have been offered the uv service but know that the plastic that holds the bulbs has become brittle and don't feel its worth the cost.
Powerful-uk-ltd are selling new LHD units at £245.00 which I had not considered until realising that the originals have a lever that flattens the pattern for use over seas. I am yet to hear back from them as to weather their units have this lever, but I have confirmed with my local MOT centre that a flat pattern will pass an mot. After some time on the phone, the chap had read through all current legislation and there was nothing to direct him to fail a flat pattern.
I'll update when I get an answer back from them.