Get Invoice with Country of Origin and HS Code

Yes, same problem here. Shipping out of the UK and unable to get Country of Origin to appear on Order Printer paperwork. I’ve sorted the HS code (although Shopify only supports a 6 digit code, not the 8 or 10 we use here). Layout issue can be solved in Order Printer after a bit of digging, but can I find the Country Code? Not a chance! Support have been unable to help and have pointed me in the direction of a developer, but I only want to know how to extract that COO so I can finish the code in the template!! How difficult can it be.