Lots of places in the US still carry them and in different configurations.... Amazon, ebay, cablesonline...
You will need to specify which connectors you need...... If you're connecting one of your Roland-branded burners to the 2480, it would be my guess that you need 25-pin male at the 2480 side (like that on a printer cable) and maybe a 50-pin male on the burner side..... Those are called Centronics 50-pin male connectors. It's easy to tell the difference.