The protectors I had were sleek and slender, not flared at the tip. I am sure that I have some left over somewhere, but that was years ago. I suppose you can sand the flared ones down though. My old ones surely still exist. China hasn't quit making cheap products, which will actually fit.
Home depot was my source. I just bought the plain plastic that were not enlarged on the tip and cut a little notch to match the rib on the barrel of the pointer and slipped it on.