<<I'm slowly but surely building a family tree.>>
The whole Jodel/Robin/Mudry/Dyn' Aero story 1957-2000 is told in great detail in Xavier Masse's superb book 'Avions Robin', published in 2000 by Nouvelles Editions Latines, Paris, ISBN 2-7233-2023-5. You'll need some French to get the best from it.
The only significant new production development in the Robin all-metal range since the book was published is the R 2120, introduced in 2001. Essentially, it combines the fuselage, vertical tail surfaces, fuel tanks and engine of the HR 200/120B with the wings and horizontal tail surfaces of the R 2160, and is officially known as the R 2120 Alpha and R 2120U (Utility version) and marketed as the Alpha 120T. The R 2160 series is now marketed as the Alpha 160A, Alpha 160Ai (with fuel-injected Lycoming AEIO-320 engine) and Alpha 160T, which is a basic trainer version on sale since 2002.