Hi, Maybe you can try to use our service.
- ShopMaster(shopmaster.com) can help you import products from Amazon to your Shopify store easily and quickly. Now you can get started with the FREE Starter Plan.
- When you received an order, you can know from which supplier you will purchase by clicking "Source". You can directly ship your Shopify orders in ShopMaster, which means when you mark orders as Shipped in ShopMaster, the orders in your online stores will be marked as Shipped as well.