Avro Anson on floats

Do any of you Avro Anson experts know the manufacturer of the floats for the SAAF 3158 Anson RB-Z (former RAF N4927) ?

No EDO floats this time 🙂

Beside four photos in the www I only found this in the Forum archive:
http://forum.keypublishing.com/showpost.php?p=1070659&postcount=15

Martin