Does anyone knows how to or already did a conversion of non reclinable buckets to reclinable?

Comparing the partlist of both I noticed the differences are very small.
The backrest have some other parts ( the handles ) and some additional parts ( cable and seatbelt guider )
The seat it self has a different frame and additional lever

The key in doing this conversion is the frame and the lever, but I guess this shouldn't be too hard to add this yourself.

As I have the non reclinable I would be interested in this conversion.