I have just noticed a fuel leak from my 86 saloon and fuel appears to be leaking from the fixed metal pipe from the filler cap to the tank. Is this a very common issue and where is the best place to buy a new fuel tank. 

Go on ebay.de and buy german there are cheap tanks but the metal is thin so spend 60 -80 have it painted or sealed too

 

Pain to get in as you need to avoid bending the neck so