As it happens their is a company in kent that does reflector resilvering:
url: http://www.ashfordchroming.com/headlamp-reflector-re-silvering-restoration
here is some info pasted from their website:
We restore and resilver reflectors for metal based headlamp units of all types of classic, vintage, american and modern car or motorcycles.
Ashford Chroming offer a complete Headlamp reflector resilvering service.
Silver plating is the best way to refurbish headlight reflectors offering a superior finish to that of Chroming reflectors.
We can restore all types of steel headlamp and headlight units by resilvering the reflectors.
The process involves chemically stripping the existing metal/paint or finish from the headlamp reflectors, and then polishing before silver plating and a final polish. Steel reflectors are often rusty and sometimes require a gentle blast before re silvering. They cost more to re-silver because they are nickel plated before being silver plated. This allows the silver plating to adhere properly and creates a better overall shine to the reflector. Some light pitting can be silvered over, or polished out. But if the lights are heavily coroded, pits can still remain visible.
Reflectors that have dents, old gasket material and or heavy coatings will take extra time to prepare, and so it is advised that you send us a photograph for an estimate before commencing with work.
We can offer a complete headlamp, headlight disassembly and reassembly service as well as general repairs and lens cleaning, again at extra charge. So you can take your lights off the car, box them up and send them straight in to us. Our turn around is normally between 3-4 weeks but we offer a priority service for 7-10 days at a 15% surcharge.
They charge about £60-£70 to strip and re-silver, not all the pits can be removed but the end result makes them like a mirror again.
Spidee.
