Badges/Rank
Thanks for the comments.
The badges are tie-tacks with the prong sanded down and the back sanded. I think the only place you can get them is at the Military Police Museum store at Ft Leonard Wood, MO.
I use Marine Corps rank insignias because they are smaller and fit on the pens nicely. I picked-up the COL rank at Quantico. I suppose they could be purchased online.
Both are metal and have to be sanded down to a thickness that you can easily bend and not lose the 3D effect at the same time.