These are the original Goofy Links. You can still find them for small birds, but not large birds. I also have/had other link toys I got at Parrot fairs years ago, that are different shapes, like hearts, shamrocks, 3 D orbs, etc. Can't find them either.
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Another toy/part I can not find is this one: Pretty sure it was called Tug-a-long or something like that. All 3 of my birds have these toys.
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It has these saucer type bead things on the ends of the chains. There is a bar that slides in the center, thru a link in the end of the chain. The bar fits so tight you need pliers to push/pull it out. After years of hanging from it, swinging, beating up this toy one of the saucer beads broke. It also wore thru where the chain goes thru the white rod center & the chain fell out. I looked every where & finally had a local plastic company make me a few white rods/holes & cut me pieces of blue colored rod to use as bottom beads, but they didn't have the center bar. I just use a quick link on the end of the chain. I would love to find these saucer/bead parts in different sizes. So far I haven't found out what they really call them or who makes them. Maybe someone with a 3d printer could make them, but I have no idea.
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Many of the Bells Plastic acrylic toys I bought years ago are no longer made and/or you can't find them. Many of the old time vendors & parrot toy companies are long gone now that made heavy duty toys that would last for years.