Geotagging and Proximity Search for Companies in Clay

Hi everyone, I have quite a unique request regarding geotagging and the ability to search for company locations specifically within Clay. Here’s the scenario. Let’s say I have a list of 1000 companies in Clay. Typical information such as company name, company website, company LinkedIn, and importantly the company location. It can be the city, town, zip code. What I’d like to do is I would like to be able to radius search companies within Clay that are nearby. So let’s say for example I chose, I entered a zip code into perhaps a formula next to the address and it runs some kind of prompt that determines how far away the given input zip code is from the aforementioned company location. It’s important that this needs to be done from within Clay. I am aware that I could export the company information into a CRM such as Apollo or Pipedrive, however this is not an option for me. To be clear, I need to be able to radius search a list of companies from within Clay. Does anybody have any suggestions on how to do that? Mapbox isnt an option as its wayyy to expensive