Robart make a set of scale retracts in around 1/5 scale. They were going to be for Ziroli's staggerwing I believe. What ever happened to that?

Any size scale retracts can be built using boat winch or similar servos with cables or belts attached to the scale retract slide collars or any other similar setup.
I am putting them in my 1/12 scale Staggerwing but I am using a long servo arm instead of a winder setup.

The problem with other types of retracts is that the rotation angle is not enough to bring the gear down 90 degrees since the wing has some dihedral.