I have a couple of spare cradles.
Over the summer, I migrated to a Zumo XT.
So I guess I actually have 3 cradles - 1 NIB, never used; one that I used on my Harley that I sold several years ago (so, the cradle is used but worked when I took it off the bike); and the one that was on the FJR - that one will go with the 550 when I get around to selling it.
I just took a look at 'em - for some reason, the ones in the boxes (the NIB and one from the Harley) don't have power cords in there. I have no idea where those would be - prolly in a box somewhere in the garage.
Shoot me a PM if you haven't secured one yet and don't need the power cord.
ETA: Duh. Now that I think aboot it, I wanna say that the replacement cradles only came with the cradle, mounting screws, and the little security screwdriver thingy. Power cords weren't in the boxes to begin with. I'm such an idjut sometimes.