oysters?????

hey fella's, i love oysters and try to get a sack when i go speckle trout fishing. i'm pretty good at shucking them but i remember years ago i saw a guy that had some sort of metal block that he used to hold the oyster and it made the process way faster plus there's no chance of gouging you hand. i've looked high and low and cant find one of these. do any of you guys know what its called and where you might get one. thanks

My dad made one when he worked at the plants years ago. Haven't seen one since. Sorry.