We do not produce a smaller diameter decapping pin.
The decapping pin on the expander rod of the die is .062" in diameter, which is the standard flash hole diameter of most ammunition cases made both in the United States and foreign countries. You can enlarge the flash holes in your cases to the proper dimension by using a 1/16" drill bit to bore them out. You will find that you get better ignition and performance with your ammunition.
If on the other hand you choose to retain the undersized flash hole in your cases, you can put your decapping/expander rod in a drill and polish down the diameter of the pin using a fine grit emery paper. This will weaken the pin and you may find that it will break when you decap fired cases.