If you are talking about grip medallions,, you can get them from Ruger. You just need the correct part number. I don't have that part number handy though. There is not a seperate 'stud" for those medallions. All one piece.
If you have the manuel,, it means you have the gun. Have the serial number handy and call Ruger. They will match up your part number request with the gun you have. Then order a few sets,, they are fairly inexpensive. But to save on shipping,, order a few other odds & ends,, !