Have a trip up there and a little day out in Macclesfield/Cat and Fiddle - maybe wait for better weather though!
I bought some downpipes for one of my old bikes from the same place, he is basically, a bike breaker so all the bikes have damage of some kind.
As some have said on here, parts are going to be expensive if anything needs replacing. Probably worth taking someone with you who knows a bit about Milles/other bikes to keep you sane if you go and look.
Bikes clearly been down on the rhs - bet someone was p*ssed off!
Might be worth asking where it came from, as I bet it's an uneconomic to repair write off (CAT D?) as just the fairing parts are unobtainable/astronomical.
How much are mint ones, and can you make it look it for less/what it would be worth?