What is the best pet insurance for 12 yr cat?

I need a help in finding a good pet insurance for an older cat. I've been checking on the web but too much information and many won't cover older cat. ASPCA covers older cat but it costs about $90/month if I pick a coverage for chronic and long term conditions which most likely that's my cat need since he is old... Is there a better choice out there? Thank you for helping my boy live better and longer.