had it MOT'd yesterday which is passes but the guy said my headlamps are in need of replacement asap ideally due to the silver lining in them blistering. Now, E21 lamps are hard to find as i'm discovering, Hella do not make them/stock them any more. it's the 4 lamp hella conversion, but the inner 2 lights don't work due to faulty earth - but the outer lights work as full beams so it doesn't matter. it's these lights that really need replacing (though the centre 2 are also shot.
does anyone know how easy/hard it is to do and how long it should take to do, and cost of parts?
if anyone can help, i'd be very happy

Ross.