The ceramic ring inside my abu garcia vengeance rod somehow fell out. Does anyone know any quick fixes to this?

Go to a bait shop that carries inserts o check Abu website and order a new one and pop it in.

Inserts are not replaceable. The whole guide needs to be replaced. If this is the tip top there are kits available or a good tackleshop should be able to help or atleast point you to a local builder. 

Tips are glued on with hot glue.  Heat it up with a lighter, pull it off, buy one the same size, heat up some hot glue, wipe on end of rod, twist on new guide, wipe off excess, and let cool.

 

I've seen a kit that has 3 tips and the glue at many different sporting goods stores.

Inserts are not replaceable. The whole guide needs to be replaced. If this is the tip top there are kits available or a good tackleshop should be able to help or atleast point you to a local builder.

I've done it before. The insert has a smaller inside edge which is what holds in in the original metal frame. They snap right in. No glue or adhesive needed.

If it holds long term, cosider yourself lucky. Once the flange is compromised they're prone to continuing problems.  

Did it to fix an older shimano rod and hasn't moved since being installed and has been going strong for about 10 years now. One reason I said to research the size is to prevent compromising the flange like you've stated. The tips are an easy fix with the kits as you've stated as well.

Huh? Someone sells inserts? Tell me more.