How to Retrieve Custom Fields for a Contact in Follow Up Boss Using Webhook or API Request in Zapier

Hi all,
I am working with Zapier and Follow Up Boss and need some guidance.
I know that the Find Contact action in Zapier doesn’t provide custom fields, but I need to retrieve the custom fields associated with a contact once I have their ID.
Is it possible to do this using the Webhook feature in Zapier, or can I achieve this by utilizing the API Request (Beta) feature in Zapier? If so, could you provide guidance on how to set this up to retrieve the custom fields for a contact?
Thanks for your help!