I don't think I would have a vehicle without gas discharge lamps or LED's.
No matter how you cut it, it won't be cheap.
The lens on the lamp at this stage will be tired and if the adjusters aren't broken, the will be soon.
Lamps vary wildly in price. A lamp with ballasts and ignitors will be €300 - €500.
New lamps are about €800 I think but you'll need ballasts and ignitors which are easily found on eBay.
You could try doing what I always wanted to do and retrofit a third party bi xenon projector
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