If you don't find anything, try outsourcing it on upwork. I had a similar situation about a year ago with some adopted code, it ran about $50, I had a talented dev from india fix it all up very nicely.
How I didn't think of it before? Yes,
"beautifying" the source code must be possible for any talented dev who has experience with the languages. The only concern remains is, what about privacy? What if he
"runs away" with the code itself? It's a closed-source project.