Fire Mountain usually has some www.firemountain.com I think. Ringsand Things often has them also, can't remember their addy off hand.
Beth in SC
Try a search at http://www.mfma.net (Metal Findings Manufacturer'sAssociation)
Rio Grande Catalog, page 621 lists Brass Hat/Lapel Pins in twolengths and with a yellow or white finish. Also think that 'Ringsand Things' carries hat pins, but do not have a current catalog. Hope this helps. Norma in Kodiak, Alaska