[JoeCab]

I am in the US and cannot recommend any parts suppliers for you.

However, I can comment on your car's electrics. In a humid climate like the UK many of your car's electrical problems are likely due to corrosion. Therefore, a few hours spent cleaning all electrical connections and grounds (do you say earth in the UK instead of ground?) with contact cleaner and a small brass brush will probably improve the situation greatly.

 

[JoeCab]

In the US, Stabilant 22 can also be purchased through NAPA stores. They will tell you that they don't have it, but it's stocked in their regional warehouses so it's only a day away if you order it.

It's expensive but a little goes a long way. I found applying it to the AFM connector smoothed out a flat spot on my car.