I just installed some 5 1/4 speakers in the dash and they gave me some Jeep factory wire harnesses for speakers so you do not have to cut your factory plug off to install new speakers. one end is factory connections, the other end is spade style for aftermarket terminals. My PO cut mine off already so no need here. These should be for 90-05 wranglers so some YJ's and most TJ's. (sorry 06'er, says it wont fit)
link to info Speaker Wiring Harnesses For select 1990-05 vehicles at Crutchfield.com
also have two 5 1/4 speaker grills, not sure if the sound bar uses 5 1/4 but didn't need grills for inside the dash, so anyone needing 5 1/4 grills (Boston Acoustic, but should fit others I assume) might be able to put them to use.
Couple bucks for packaging + shipping is all I want. Will separate grills and harness if you are only needing one item, but not separating grill from grill or harness from harness
I've shipped enough to know the average cost is about 4.00 to ship something this small anywhere.