Could it, though? I mean, for that much they'd probably do it anyway and then just lie/obfuscate it, but legally they might not be able to do a copywritten character without the right permissions.
A lot of those "custom part" casting on demand companies don't really care what it is exactly that you are making, and in a fair number of cases a human doesn't even look at the part file. All they care about is the size of the piece, how many your company needs, and that you uploaded a properly formatted 3D part file. If you made your own 3D part file so you weren't stealing an official one, and you weren't trying to actively sell hundreds of statues to other fans for profit, then you land very nicely into that "fan art" location that companies are very,
very loath to actually pursue do to the horrible stink it creates among their own fanbase.
It would still technically be illegal, of course, but it's the type of illegal that companies wave away as not worth the legal fees instead of bringing the hammer down on and that on-demand creation companies make a nice little side profit off of making 1's and 2's of. (Unless the statue you were making was of a WH40K character of course, then woe betide the one who dares to cross the over-enthusiastic Games Workshop legal team
).
So legally doing something like that would is kinda like driving only 5 mph over the speed limit in a safe area; it's still illegal, but the cops aren't gonna pull you over for it (unless you get a really mean cop who has had a really bad day).