Fuel tank rusty and few of the pipes are too

So where's the best place to buy a fuel tank and filler neck, is for a cabby gti 1986 also the pipes around the tank are rusty and one started to leak so where can I replace them? 

Oooo they're crusty! Haashimmk1

Try Mark at Classic VW, he should be able to help you out funk-star

Thanks dude I'll check it out