Any suggestions for how to re-attach my swing canopy?

Would help to see a photo of the swing and what you wish to attach it to.

they use clamps in electrical pipe installations that may work check it out at your hardware department. Used to attach pipes to beams and other pipes, made from steel and alum. one may work for your as a retro fit

Could you repair with jb weld? Maybe take them to a shop and have them welded? Wouldn't cost much

While you're at the hardware store, look at the various types of carpenter clamps too. Take in your plastic pieces and talk to someone there for ideas. If you can get metal it will last the longest. Plastic just weakens, becomes brittle over time and UV exposure... have you tried contacting/looking up the manufacturer? They may offer replacements

I've ordered these replacement parts from Garden Winds. Just double check the measurements on yours to the variety of replacements. They a mostly generic.

We are looking for those exact same parts but have had no luck and can't even ID the manufacturer.

Email from Garden Winds indicated they don't sell these mounting parts and suggest to contact manufacturer.

If you're like us the swing is too old to find a manufacturer from the swing, parts or any lost paperwork.

Does anyone know who the manufacturer is? ps as shown on our website

I have this same brackets that need to be replaced has anyone found a way to get them or how do update them my swing is still in good shape so don't need to buy new