Jumped the gun and bought some shackles without making sure they fit. Turns out the frontier and the x use different ones, DOH. So i have a pair. THey are from here
http://www.rockymountainsusp.com/W_shackles_Nissan.HTM
and they are the non greasable ones. Look just like the picture except they are painted black. Should fit any 98-04 frontier.

$20 + S&H from 97015 (approx 5 lbs)