Replacing guides on a rod??

Okay so I have a penn rod that I absolutely love rated 40-80lbs 7'6" major backbone. So a few months ago I popped one of the ceramic inserts out lucky I was able to pop it back into place. That only worked for a few outings and then I lost it. The rod was only $50 brand new but I can't find a new one.

Anyways I am wondering how much it will cost to replace this guide with a new one??
Or would it be worth while to replace all the guides on my rod with foul proof guides instead and how much aprox cost?