I am not sure of the style of adjusters you have but was thinking. Maybe if there are adjuster slots for the slider then maybe you could use that for a sprocket. It looks thin though and may need support of some sort. Maybe something as simple as a large washer or thicker larger metal piece with a hole to work as a washer.
Just throwing an idea out, not sure if there are even adjustable slots or not. I have seen the factory sprocket style and have seen them bend, so it needs beef.