I got the plans for that from Mike (Holescreek) a few years back, and made one for my Myford.
I had to re-draw the design, as the Myford has a lower centre height than the logan, and this meant quite a lot of changes, including a smaller bearing.
All the features of the original are there, but nothing is the same.
Also, the Myford needed a rectangular mounting plate to fit the T-slots, which makes it nice and stable. It's scary smooth in the cut.
As far as I know (according to Mike) I was the first one to make this from the 100's of plan copies he sent out.
Here is my version of it. I have the design drawn up in Solidworks as a 3-D model, but could AutoCAD or PDF it if anyone wants a copy (with Mikes permission).