We have developed an app that allows B2B orders to be emailed to an address such as orders@yourstorename.com and the order is automatically uploaded into your Shopify store.
We have a number of stores already using the app but need more to check the different ways orders can be processed within Shopify and Shopify Plus.
If this is of interest please contact us at info@oimaging.co.uk - or see www.pdfdatanet.com/shopify for more details.