I personally have never seen a diesel D50 turbo. I searched on the internet and I think they are really rare.
One guy on here had one, I went for ride in his 40 with it. Went pretty nice. He ran no wastegate. As I think they will not put out that much pressure.
I also think it is a little small IMOP. But works if you find one. And bolts right up to a flipped manifold supposedly.....