Everest watch company does it and a few other small "cottage industries". There are plenty of caveats however. This is all hand work. If tiny imperfections and surface irregularities are going to bother you, then you'll probably want to pass. These individuals have a backlog of time consuming work. You could easily be without that watch for months. Often with no communication. It's also not super inexpensive, (a few hundred). Plus, you've got a stranger disassembling your watch. And, as a parting thought, it will play havoc with resale value if it's the least bit collectable or highly thought of.
I've had it done on fun project watches. It's both an upgrade and not, based on what is your paramount concern. If you're spending that much time, energy and cash to make a cheap watch glow better, just buy a Seiko of your choosing.