I just learned of a good source of lead, which promises lower prices than I've seen previously
Go to seafab.com to see their site.
Orders must be placed by phone and shipping cost is extra, but they quoted me a current price (June 24, 13) of around $1.80 per pound for bullet alloys, lino, etc. If you have at least 200 pounds shipped delivery by freight lines is fairly ecconomical. Location is Casa Grande AZ, below Phoenix a bit.