Hey Eeda,
Do you mean the little black rubber feet on the underside of the mount?
http://www.dehuangroup.com/UploadFil...3122400751.JPG
If yes, then a hardware store will stock items like this. You may need to replace all three if you want them to look all the same. But one of the three being a little different (taller, fatter) won't make any difference to the action of the scope.
Just be mindful of how you attach the replacements - you don't want to have scew tips or heads touching the underside of the rocker box base.
Alex.