There are several ways to "duplicate" a hole in materials. Avery carries a tool called a STRAP DUPLICATOR, and are available in several different sizes. I found his type of tool useful, but at times was not appropriated to any type of curved surface I was working on. I had to come up with something different.
I ended up with two different approaches that worked very well for me.
1. Cut a strip of paper poster board material about 2 inches wide, and 12in or so long. You want a lot of "extra" length here. Locate the hole you want to work with in the base material, place the paper "strap" over this hole, and tape it down into position at the opposite end. With a small, sharp, pointed tool, push the tool through the paper and into desired the hole. You have just "located and registered" the hole. Now, leave the "paper strap" taped down, but lift the punched-hole end and slide the new unmarked item (skirt) into position. Lay the "paper strap" back into position, and the previously made hole will be your guide for the location of the new hole. I found this process worked ok with just needing a couple of holes duplicated, but was very time consuming when a large number of duplicated holes were required. This brings us to the item #2.
2. Pilot drill all holes in the base / underlying material. You should have a good idea where the holes will be located when you positioned the two items one on top of the other. Mark for edge positions on the base material. Now, with a long straight edge, draw as straight a line as you can through the center of the previously drilled pilot holes. This line needs to be a good 10 to 12 inches long, in whatever direction, away from the hole, that you can re-measure in a later step. Once the lines are drawn, carefully mark the center of the pilot holes with an accurate, small, perpendicular line to the previously dawn line. You have just declared the location of the pilot holes. Now, from the center of each pilot hole , measure out exactly 8, or 9, or 10 inches along the first line and place another mark. Now you know that the exact center of the pilot hole is located exactly 8, or 9, or 10, or whatever inches away from this mark. Finally, place the overlying material on top of the base material, use your straight edge and transfer the long straight lines to the top material. Measure from the visible reference marks your exact distance, and you have now marked the positions for the duplicated holes.
Hope this helps...