Did you ever resolve the 2d barcode on integrated label issue? We are currently facing the same problem.
We have the same issue. Does anyone know of any progress in this area?
We use these labels for all our shipping carriers - https://www.cheap-integratedlabels.co.uk/product/single-integrated-label-s7/
You can even squeeze a CN22 label on the bottom of it for your international orders.
We currently use both OBA and Tracked services using UP labels from Priory Direct:
6x4 label at the bottom of the page fits 2D barcodes on for both OBA and Tracked services.