Allow multiple label printers, not just the one

I have a 6x4 label printer installed for Royal Mail labels which is attached to Storefeeder. I was provided another label printer by DPD which prints their dedicated (smaller) labels - I currently have to go into the DPD app to print these - they need to be auto printed by Storefeeder. Currently Storefeeder only allows one label printer to be attached - Ideally I need 3 - the other being a dedicated barcode label printer