Getting older myself yet with an even older Volvo, I too would like HIDs in my old 745T BUT WAY too much money. I did upgrade my OEM sealed beams to a seemingly better type but the low beams are still not ideal at night on dark roads for me.

There might not be anyone here who knows about how exactly to do what you're asking here but I am sure that someone, somewhere can do all that and it won't come cheaply.

To be completely honest, if you can afford it and night vision is THAT important to you, you might be best to trade your car in for a newer model that already has all those features (at least they do in the US). You could spend alot of money trying to do all that with an older car and still not have great results, not worth what it might cost not to mention possible added electrical issues from adding HIDs.