Zinc Flashing??

[gareth h]

Advise please... I'm having a roof fitted with zinc faced shingles, the invoice says lead should not be used for flashing due to a chemical reaction with the zinc.
The guy who does the leadwork says he doesn't know where to buy zinc, and could use lead with a bitumen flashing in between to stop the reaction.
Would anybody know where I can buy zinc flashing?
Thanks
Gareth

[gareth h]

Thanks for all your help guys, have investigated with several reputable organisations who all say no probs, think the shingle manufacturers are just covering their bottoms.