Polar websync depricated - Solution HomeAssistant?

Unfortunately polar decided to end the service polarpersonaltrainer.com by the end of the year.

This service is needed for devices that sync data with polar websync or polar weblink.

Without it it won’t be possible to sync data with the web anymore.
The thing is I like my CS500 cycling computers a lot and I did not find another cycling computer that fits my needs as this one. After 5 years it’s still the best for me (don’t like or need cycling computers with gps, because most of the time those will be empty, because I forgot to charge them).

So the reason why I’m writing this here is to maybe find others that want to keep that data synchronized. There are a lot of great dev’, maybe someone is able to reverse engineer this one and integrate it to home assistant

By the was I already contacted polar about not ending the service. Long story short, they will end it because customers should buy new devices.
Of course they didn’t say it like that… just showed me a link to new devices. Not gonna happen, polar.

The hardware to sync the in my case CS500 with the PC is called polar Datalink.

So any suggestions, ideas.
I’m not a developer, but would be happy to help.