If you need just a little bit of sheet go to the nearest Goodwill and see if they have any English made tankards. They are made of lead free pewter. I cut the rim off, cut down along either side of the handle, then cut around the bottom and thus have an odd shaped sheet of pewter. If you need it thinner and have a rolling mill you can run it through that or hammer it to the desired thickness. I save the top and bottom trimmings and the handle and save them for future projects. Here in the Phoenix area a tankard will cost around $2 or less at Goodwill.