Hi Chris,
Printrooster Order Printing app has just been updated to support Shopify’s fulfillmentOrder API and Shopify Locations. It can be used to print order data or fulfillmentOrder data, so you can print invoices for whole order and packing slips to each individual fulfillment, automatically. If you’re using different locations to fulfill your orders, the app can also be used to filter the fulfillment printing by location. You can also pre-filter your orders to be printed, and also print picking lists for orders or fulfillments.