Search bar for metafields

[Jtpfarm]

I created a searchbar on my collection page. I'm looking for a way to make it search metafield values in a specific metafield. Can anyone help me with this?

[ShopDoc]

It would have to be custom coded, you may be able to find a search app that will do this as well. The build in one does not allow searches to be specific to any data right now. It pulls from everything. You can only include or exclude products, pages, and blog posts.