Doesn't look good so far. Here's a page about the 2002 Ram 1500 (should be the same as ours):

http://www.tune-town.com/Cars/stuff/Dodge/2002%20Ram%20Pickup%201500%20car%20stereo%20installation.htm

Lists the OEM-1 adapter as unavailble. They do have the antenna adapter at least. I'm going to talk to PAC this week and see what they have planned..