This piece is close: http://www.amazonsupply.com/dp/B003JU1FBG/ref=sp_dp_g2c_asin http://www.amazonsupply.com/dp/B003JU1FBG/ref=sp_dp_g2c_asin 6.5 inch outer,

This piece is close: http://www.amazonsupply.com/dp/B003JU1FBG/ref=sp_dp_g2c_asin http://www.amazonsupply.com/dp/B003JU1FBG/ref=sp_dp_g2c_asin 6.5 inch outer, 5.5 inner, 12 inches tall (twice what the video shows) for only $700. So I'd say $300 would be a good estimate of what you can get that piece of copper for. That magnet is also probably pretty expensive, that's a big one.