Shower Door Vertical Seals Where Can I Buy Replacement Vertical Seals For A Folding Shower Door?

Where can I buy replacement vertical seals for a folding shower door? - shower door vertical seals

I have a seven-panel folding screen print in our bathroom shower. Some seals are broken or pop as constantly abused by the former residents. I searched high and low, but can not find a place that sells parts. I can not find it go to the provider.

Does anybody know where you can buy separately the stamps, which go between the plates?