Absolute luck of the draw but I bought 4 wheel cylinders and a master cylinder from Rock Auto about 5 years ago (for a 3100) on one of their "supplier closeout" offers and when I got them, all 4 of the wheel cylinders were made in the USA. The boxes were pretty old and very shopworn, so I suppose they got them from some parts house or warehouse who was closing. I took them apart and checked all the rubber parts before using them but they were ok. The master cylinder wasn't US made...maybe Brazil, Spain, something like that?
