That's definitely been modified. A pocket was machined out for the seal and that collar was welded on to provide lateral support for the snout since there is less material in that area inside now.
We always knew it could be done, but the lack of strength after machining the pocket was always the concern.
Yes, I did have one made for my truck machined out of 4130 chromoly. Still working great. Can get more made, but the problem is the price. Nobody wants to pay $350-$400 for one and you can't get enough people to commit to buying them to make a large run which is how you bring the price down. The material cost isn't that bad, it's the setup and machine time that costs the most.