that looks all quite normal as it should be. The pads aren't available nor any other parts of it. If they don't have any slack in them remove 'em, paint 'em and bolt 'em back into their location. That's what I will do, too. Since 6 years... :whistling:
The outer housings are welded together IIRC. I've never tried to take one apart, but my guess is the pads are vulcanized to the housing and the beam. There's a little slop in the mounting holes for height adjustment, I have seen shims behind the bumper itself to adjust the depth on the fender.