A wear gauge should be easy to make for the person who has a CAD program and a scanner. Print the results on thin flexible plastic with a hole in the center and a slit at any point from the outside to the hole. This would allow the rear sprocket to be checked with the wheel mounted. The front should only need a hole in the center. Bet the person making these could make a buck if they were priced properly.
2005 KLR 685
2015 Yamaha Super Tenere ES, 5/23/2015
2012 Yamaha Super Tenere; Purchased 7/30/2011; Sold 5/23/2015