For relatively inexpensive scoring gauges, look into either gauge pins or steel dowel pins. I have used 1/4 inch steel dowel pins that are 1.5" long to score .25 caliber holes. They work very well. Gauge pins can be had individually in .001" increments quite easily, but you have to dig a bit around the listings for the sets. The source that comes to mind is MSC direct, but McMaster Carr and any other machine tooling supplier should have them as well. You can get very precision (USA) to less expensive off shore made ones. The price tells the story. But, for practical visual use with scoring a target, you will not notice the difference.
Locally, we shoot benchrest at 25 yards/meters and at 75 yards. At 75 yards we have been using the 10 meter pistol target as it is quite available and fairly similar in scoring to the EBR target (it was what was used in the first matches). Though, (Robert, are you paying attention) it would be nice if AoA were to print the official target in single bulls with their logo in the corner, like the NRA does, and sell packs of 100 (or more) in their store and website. Our club in Idaho would certainly buy a few packs. It should be less expensive to have small targets printed rather than the full size 25 bull target used in the matches. Also clubs would find it much easier to post up several bulls on their usual target stands than to have large frames made to hold these rather obscenely large targets. They are fun to show off as definitive proof "I was there", however. As such, I would not want the EBR to change the size of their official match target.
For local matches (unless your shooters are very good) you can generally get away with five shots per bull and still score effectively. Even if they are very good (often makes it easier to score) five shots is do-able though you might have to guess some by putting another target in back of the shot one to see where the scoring rings are. At our club we use the rule: If you can't tell, the higher score goes to the shooter.