I have manual windows in my El Camino and the manual crank is not working well. It seems the inside of the crank is very loose so its not aligning with the teeth making it hard to roll up and down. The interior handle has a lot of play in it. 8O Is it hard to replace and does anyone have one for the drivers side door?

After a little research, the part I need to replace is called the window regulator. Anyone have tips or suggestions on replacement or were to purchase?