I don't know of any repair shops in the area that do that kind of work.You can attempt to do it yourself (there's a couple articles on this forum).
Mine recently got broken after getting it back from the paint shop
- I fixed it myself - not perfect fix (i.e. you have to still jiggle the window just right to get it to go up) - good enough for now tho, so I'm good w/ it.
If you don't find anything in the next month or so, & don't feel comfortable fixing it yourself, I might be able to help you fix your window - I charge a nice meal, restaurants in LA are delicious, haha.
bew bews