That version of the tailpiece and bridge was made by Schaller of Germany. They still sell the roller bridge, but I don't think the tailpiece is a current item. Thomann is a Schaller dealer.
https://schaller.info/en/bridges/
If you want to change the style to a more common bridge and tailpiece, many people here swear by the Faber units. The trick it to make sure that you use the correct spacing.