Recommended App for dropshipping brands I choose NOT alibaba etc?

[sockmaidenps]

Hi! We are a sock brand and for the holidays, I would love to sell other brands' complimenting gift products as dropship. To be extra clear, I am looking to add in product that is independent and selected by me from all over, I do not want to take product from an existing dropshipping app with built in products to choose from. The brands I like may not even be on this app, or use Shopify.

That being said, I would like said dropshipping app to be able to email order alerts to the correlating manufacturer that product has sold, along with the buyer shipping info etc, maybe even pay out the wholesale cost. Does this magical app exist? If it does I would love to check it out. 

Thank you in advance for your recommendations ❤️