Ken's Electronics in Kalamazoo MI has one listed on his web site.
http://www.kenselectronics.com/lists/pwrcord.htm
What you're looking for is
CEA-DC-AR3300-30 Clear Channel Ranger 30 Watt ham amateur radio power cord 16ga 5-ft 7-1/2 Amp fuse
You'll want to change the fuse to a 2 Amp size to be safe for this radio.
I don't see any polarity marking on the power socket. You really do need to be sure a new cord doesn't have the DC polarity backwards.
Hook it up with plus and minus reversed and you'll get damage. Only question is how much.
73