Search bar app with custom redirects

Shopify Partner
4 0 1

I am in need of a somewhat custom solution for search, and curious if anyone knows of any apps that do this out of the box. Here are the requirements: 


- search bar with product autosuggest 

- if the user's search contains a specific string, then redirect them to an external site

- the redirect URL needs to contain some paramters (e.g. "?query=users-search-here")