The photos compare your 59-067 (left) to the spline In looking for. It's from 1970's era aluminum enclosed patio. Not sure what manufacturer.
Casey from SWISCO responded:
January 21, 2021
Hello,
It looks like the 59-067 was too large to replace your original seal. Unfortunately, we do not carry a closer replacement option. You're welcome to review our return policy here. Thanks for posting and good luck with your repair.