SodaStream Penguin (leaky gasket needs repair - $30

I have a SodaStream Penguin for sale.
It recently started to leak out CO2 while carbonating.
I believe there is a black gasket/seal that is failing after over a decade of use.
This SodaStream is a workhorse and they don’t even make this model anymore.
Plus it uses the original blue SodaStream screw in CO2 canisters.
Again, this machine works but not perfectly and doesn’t fully carbonate so it’s best for someone who knows how to work on these and can replace the gasket or wants it for parts.