MoonshineStill.com : Offers large Paul Revere copper sheets ($449.00 for 3'x8') designed specifically for still construction.
eBay : A good source for finding both copper patina or mill finish sheets, allowing for price negotiation with sellers. Key Technical Considerations 22-Gauge Copper Sheet 36" x 96" (3'X8 - Moonshine Still
For building a high-quality still, the most recommended sources for copper sheets include specialized metal suppliers and dedicated distilling equipment companies. Most experts recommend using or Alloy C122 (Deoxidized) copper. Top Places to Buy Copper Sheets
: These vendors are ideal for buying raw sheets in custom sizes or bulk.
: These suppliers provide copper specifically sized and gauged for still-making, often using the same materials they use for their own manufactured units.