I checked my parts and this is what I have (and may be even more confusing).....
The replacement Marco part # is F1P-E-04-03-00. Compared to what I pulled from my Breakshot, these are thinner and more narrow. This is also what I used as replacements in my game, and they work just fine. In addition, the decals I got for my targets fit perfectly.
Here is the confusion (to me anyway) - The targets I removed are wider and deeper than the replacements. I have pics below to compare. I also have a pic of the replacement targets in my Breakshot showing that there is indeed room for the wider targets. These used ones came from both Breakshot and Airborne. 6 were from Breakshot. I also have 2 used ones that are the same size as the Marco replacements. Go figure. My games were routed and had a mish mash of stuff in them.
Anyway, check out the pics and if you can use them, let me know and you can have them.
2 used that match the Marco targets:
Replacement Marco targets in my Breakshot showing the room: