https://www.ycr.co.uk/product/sam4s-nr510-20-printer-cap/
Sam4S Nr500 Printer Cap
Replacement printer cap (internal printer cover) for the Sam4s NR500 series ECR Fits both the receipt and journal side Suitable for the following ECRs: NR5
printercap
https://www.norpin.com/rectangle/nr500-813a-xxx-al/
NR500-813A-XXX/AL - Norpin Manufacturing Co. Inc.
xxxalmanufacturingcoinc