An editor or "professional" publisher may be able to explain the author what the problem is, but if they upload the book to KDP, they'll the exact same information I do. Unless there's some old boys network of course.
There may also be publishers that have an in house printing service. But then you lose the distribution advantage Amazon offers, because they can get a book from the printing press to the customer much faster (without inventory).
As I pointed out in the blog, it takes Amazon about 3-4 days from their printer in Poland to my home in Utrecht, and that includes 1 day in some sort of intermediary Amazon delivery warehouse in Rotterdam. IngramSpark needs two weeks to get book into the EU, but even in the US - when a customer orders from Amazon - they seem to need about a week. Old school publishers are probably even slower, if they can do print on demand at all.
I think it's instructive here that KDP stands for Kindle Direct Publishing, not Kindle Direct Printing.