Window regulator
 

Got a 93 Buick regal that the front passenger side window is working but going up and down crooked. I'm guessing regulator but can't find one new or used anywhere. Thoughts?

Before jumping the gun, it would be a good move to remove the interior door panel and actually look for the problem because it may not be as complicated as you think.

Sometimes a bracket will come loose that contains the window channel or there may be a bolt that came out that holds the window to the regulator assy. They usually use 2 bolts.. You will need a few special tools to remove the panel , which will help prevent any damage to the cardboard.

With the window part way down can you move the window to straighten it? That should give you some idea of just what may be wrong.

Yes as you have to help the window once it goes crooked halfway down to straighten it back up to make it roll up right.

https://cimg3.ibsrv.net/gimg/www.bui...ce064a351b.jpg
It's this part right here that is broke. I don't know the name of it so I can look for an aftermarket or whatever.....

You could try a few auto glass shops or a dealership.
These are special parts and usually only a dealership parts dept will have/get them.