Product page: http://www.avid.com/US/products/artist-color

Price: about $1500

Available at:

http://www.ebay.com/itm/Avid-Artist-Color-Euphonix-MC-Color-Correction-Grading-Panel-DaVinci-Resolve-/270969650466

http://www.ebay.com/itm/Avid-Artist-Color-Color-Grading-Controller-Surface-/370599479922

Tangent Devices CP200

Product page: http://www.tangentdevices.co.uk/products_cp200.asp

Price: about $1800, used

Available at:

http://www.ebay.com/itm/Tangent-Devices-CP200-BK-control-surface-panel-for-color-grading-/180874275408

Tangent Devices Wave

Product page: http://www.tangentdevices.co.uk/products_wave.asp

Price: about $1500

Available at:

http://www.adorama.com/TAWAVE.html

http://www.bhphotovideo.com/c/product/571637-REG/Tangent_Devices_WAVE_Wave_Panel.html

Tangent Element

Product page: http://www.tangentdevices.co.uk/products_element.asp

Price: about $1200

Available at:

http://www.adorama.com/TAETKP.html