Help with Cartridge Filter Crack

[Coachjy]

Hello to All,

I currently have a bad leak in the side of my pool filter on the bottom part. My filter is a Pentair CCP420 cartridge filter. I have priced out buying just the bottom part as well as the whole assembly. And obviously there is a significant price difference.

My questions are if anyone has ever run into this and if so what kind of problems did you have if you just replaced the bottom? Did the new bottom line up with the old top? Should I buy a new OEM ring?

Basically need recommendations on what would be the best option.