 "Manfrotto 502HD Long Quick Release Plate 504PLONG" " Manfrotto 504PLONG For sale! - EuroOptic.com
"This Manfrotto Long Quick Release video camera plate fits 502HD, is made from black aluminum, and has a length of 50cm." 
 "Manfrotto 501PLONG Long Quick Release Plate" 501plong on Markertek - America's Broadcast Supply House"
"<b>Manfrotto</b> <b>501PLONG</b> Long Quick Release Plate" 