I remember several Prinair Herons at Opa Locka when I went there in 1984, also I think they had several dismantled Malaysian AF Herons there for spares.
Of course, there lives a Heron less than a mile from where I sit now, the former British Nuclear Power example G-ANUO, masquerading as Morton's G-AOXL outside the Croydon Airport terminal building. I see it's been spruced up a bit and now carries Airport House titles rather than Morton Air Services!
https://maps.app.goo.gl/G1Zuk3ejy6XnWnFq9
(There was also a Tiger Moth inside the terminal building a few years ago; believe it's now either airworthy or still under rebuild. Be nice to see the Heron flying again but not courtesy of the high winds that are presently doing unspeakable things to the sycamore trees at the end of the garden.)