Looking for a "Several categories dropdown menu search" WordPress plugin

Hi everyone,

I have 2 parents categories in my posts :

  • “locations” which contains cities as subcategories (such as “New York”, “Seattle” etc…)
  • “audiences” which contains age related classification as subcategories (such as “children”, “teenagers”, “adults” etc…)

I’m looking for a WordPress plugin for my search page with the ability to add 2 independant categories dropdown menus with only seleted options.

That should look like this :
[Audiences_subcategories_dropdown_menu] [Locations_subcategories_drop_down_menu] [Search_button]

Please note that, as posts have still not been created, I don’t mind to install a plugin that uses custom content

Thanks for your answers!