does anyone know of a plow frog that would bolt up to a ford/Ferguson plow leg and allow the use of modern/available parts. I know on my Deere plow the holes never changed (between the vintage and new) and I was able to put new frogs on and now can easily find replacement parts. I'm looking to fix up a Ferguson 12A plow. it's in good shape but I dont want to break these parts. thanks for any help