To my knowledge nobody is making them. They were made by I think quackassassin on CCO, but I don't believe he makes them anymore. With a lot of luck you might find a used one, but it is highly unlikely. More like impossible.
If you make a wood jig to split 1/2" dowels you can make a basic one yourself. The LA board is 1/2" and the wedge with a few degrees of angle on the wedge. Getting that degrees is the complicated part because it depends on your board length and wedge length to leave the correct tone channel opening.
Marvin
