Help with a plugin

Hi,

I’m looking for a plugin that will add a specific search function to a website that I am re-designing.

There is already this function on the original site that they are using but the site was made by someone else using a bespoke management system.

The page with the search function is here – https://www.genesisproject.com/keg_participants

and the page I am hoping to achieve this is here – https://genesis.bypaulharrison.com/

Does anyone know if this plugin exists? I have tried a couple but none seem to do what I am asking.

Many Thanks