I have spent a bunch of time today looking for this discontinued Brainstring R puzzle. Wondering if there might be sites selling a used one? Tried EBay, Etsy, Amazon. Posting here to
Brainstring R
Brainstring R Puzzle Node - Stacking Blocks - AliExpress
Recent Toy Brainstring Value Pack Puzzle (Includes The Brainstring Original Brainstring Advanced And Brainstring R) - Brainstring Value Pack Puzzle (Includes The Brainstring Original Brainstring Advanced And Brainstring R) . shop for
Brainstring R Brainteaser Puzzle : Amazon.sg: Toys