I've never had to buy them for my S2, the boat came with a bag of 10 or so. I have bought them for other boats before. Measure up the ID of the grudgeon and the OD of the pintle you will likely find something from "Grainger" that will work. Last time i bought some I found the size i needed made by Igus in plastic and also in brass without a brand name. My local Grainger warehouse got them in stock for me in a day or two and the 4 I bought cost about $5. The brass ones looked like they where going to last longer but they felt sticky sometimes from corrosion build up.
