anyone with an old Thompson Center always has room in their possible bag for a new nipple.I keep several of each (T/C, Lyman, CVA)ones around the house. Seems every time some one brings me a rifle to sight in or help with problems, I am changing them over to a new stainless steel nipple.
If you only paid a quarter for it, hang on to it and when you meet someone with a T/C give it to them and make their day....