Replacement-bands for StretchCordz?

I have used my Stretch Cordz a lot and for many years, but now the rubber is getting brittle. Does anyone have any tips for getting the rubber replaced? My wanted resistance is green/medium.

I know StretchCordz has replacements, but with shipping it will cost $100 to get them. Then it would be much cheaper to get a new set from Finis, but I do find it a bit shame to throw it away, when a new rubber cord would make it like new.

There’s a company in Stavanger who do a home training bar called the Chimp.

They sell replacement band sets for 349nok, they look like they have a different connection, but may work?

https://hjemmetrening.no/collections/all