Wow, now that’s an awkward looking design. I think it’s not easy to pull off the “halfway between saucer and sphere” look.
As for who made this: If you look at the comments on this image on Pinterest it was apparently a kitbash made by one Michael Bower Putman aka
Feyman Federation Shipyards. He was a prominent figure in the kitbash community in the early 2000s, but I don’t think he ever posted here. And I’m not sure if he’s still active either.
On this design he comments “I was in a Daedalus phase ... so tried an Enterprise era quad nacelles Daedalus variant ...” Unfortunately there aren’t any more pictures of this particular built on his website, presumably because he himself wasn’t really satisfied with the result? But I reckon it might be worth shooting him an email and ask if he still has more pictures of it.
The sphere seems to be a kitbashed element from
this Perry Rhodan model kit.
Just for fun I tried to clean up the image a bit and give it the whole Photoshop treatment, to better envision what this would have looked like …