Peugeot 307 2.0 HDI rear seat catch issue - advice/diagram needed PLZ!?

PLEASE HELP.

The release catch of my passenger side rear seat (where you can fold it down) has broken. I was quoted £95 to fix then saw on another post on here that I can take it apart and try to fix it (usually a spring issue).
Well I've managed to take it apart but as I did all the bits within the casing all fell out, clearly it was all loose, probably from overuse from moving house recently. From what I can tell nothing is broken or missing etc so seems that it just needs putting back together.

I've managed to put about 60% of it together but I'm now stuck on the spring and final elements.

Does anyone have any pictures, diagrams or website links that can show me how to fix it all back together?

Thanks

Oh its a Peugeot 307 2.0 HDI 2002