Solved Finding who has what and how much?

I want to know where I can look or what I can do to replicate this plugin for the /finditems "item name" amount
Unfortunately its currently not working for me and it seems as if its discontinued until it's remade. Does anyone else know of any utilities or tools I could use to find this information out? I need it to see the amount of items players currently have on my server after these first two weeks so I can adjust rates accordingly.

 

Thanks for your response I'll be testing it as soon as I get a chance!