Sorry, thought he was talking about the filler strips. Photo didn't load the first time I read it. I believe they are or will be reproducing the fillers.
I am sure someone will comment on moving the bumpers in. I read a little bit after your post to see if I was remembering things right, opinions vary and one poor guy went through all of the trouble and then found out he couldn't mount his 71 grille inserts. All the more reason to reproduce the fillers.
Edit: Fmmpar on ebay was listing them, none up at the moment. There may have been another company making them, or I may have just seen them advertised in more than one place. And yes, the 'pads' are pretty common and fairly inexpensive.
Second Edit: Fmmpar has the rear sides and the rear center fillers, but you need to reuse your original hardware for the center. They are producing the front sides and center, and were hoping to have them in time for Carlisle (this past weekend). So if they did not debut them at the show, you should see them for sale shortly.