Checked my old Just for Jeeps invoice, freight was $80, although I did have a few other items included with that. I thing freight has increased quite a lot. If you do international checkout it will come up with the freight cost.
Re pics of the number plate brackets, Don't have any close ups, but the fixings are all concealed.
Hopefully the pic below (when size is maxed) will help. The rear just looks the same. Effectively they have an aluminium backing plate / adaptor that pickes up the OEM screw holes with countersunk screws. Then the numberplate is fitted inside the plastic cover with black frame that is held on by 4 screws (1 each corner) that screw into the aluminium adaptor.
, on Flickr