Hi, I'm not sure if this is the right place to post, but I have a 1997 washburn WM100 which has a buzz feiten tuning system, unfortunately at some point I lost a little circular nut that is on the bottomside of the headstock and seems to control the height of a little ball inside the string holder (I know my technical terminology many be lacking here). I was wondering if there is any plae I could buy one, because I can't seem to find it anywhere. Any help would be greatly appreciated!