metra part number 40-CR10 and yes its a chrysler antenna adapter cable but its for ours too, and as for the wire harness scosche part number FDK11B
Thanks for the info!
I ordered a new Boss BV755B from Crutchfield and started to install it today. It came with the wiring harness adapters and Metra dash kit I needed for installation but did not include an antenna adapter. The Shaker 500 antenna cable connects on drivers right whereas the aftermarket Boss unit connects on drivers left and there isn't any extra cable length to makeup the difference.
Surprisingly, Crutchfield tech line was no help and knew of no solution.