Ah. Personally with the information shown on this illustration I wouldnt find it difficult making my own template. A bit more hands on than some may be comfortable with, but so is cutting the carpet.
Cut a piece of cardboard to the shape of the floor . Lay the cardboard in its correct position on floor and place the mat on top in its correct position. You will need to judge for yourself whether the mat is in the best position, without affecting pedals etc. Mark through the turnbuckle holes with a pen to establish their precise locations on the template. Remove mat . Lay the new clips on the template with the turnbuckles aligned with their marks . From this you can establish the location of each of the two holes needed to be cut for each clip, and the approximate size the holes needs to be. The clips may pass through with just a slit cut rather than removing a full oblong of carpet. Simples. The hardest part will be cutting the holes in the carpet, but thats true whether or not you have the template.
Just remember the old adage , measure twice (or more) ,cut once . With a slit rather than cutting and removing a section of carpet in exactly the right position you have a bit of wiggle room, extending the slit slightly if necessary until the turnbuckles align exactly.