I replaced my stem today, but it seems the new one doesn't take up as much room on the tube as the old one, so I have about a 1/8 space of exposed metal. I suppose it is mostly a cosmetic thing, and probably helps protect it from the elements in bad weather; but do they sell very small spacers. Right now, the stem is sitting on top of all of the standard (3/8"?) spacers; with about 1/8 inch between the top of the stem and the top cap (don't know the technical term for that thing).

Should I try to find a set of small spacers to fill that area? Or is it not a big deal?