if you need parts for the cossie, go and see Gary @ RS Classics as he is round the corner from you.

As above, service it, possibly even change the belt and tensioner and take it for a set-up - any decent place should be measuring the voltage from the pump so you will soon know if its not drawing enough current.

Fuel pump looms are around 50-60 i think

Ive just ordered a fan loom from Paul @ NYRS and he does two different types - i went for the newer sooper dooper 2 stage fan kit which is £68 plus delivery.