That cab sure is nice. I recently saw another post on similar cabs on John Deere CUTs for Europe. Both are really sharp, and it seems like it would not be a big deal to get them for the US. It sure would be nice!
That looks like a new holland product not after market. I say that because it appears to be a smaller design of the TN cabs,
see attached.
And yes the loader would still work. The mounts are just in front of the cab. Plumbing is a little more complex with a joystick inside.
These cabs are really nice. The top is plastic on the TN and appears to be in this picture. No rust. Great set of lights on front and back. Like daytime even on a dark night.