I'm working on a project that I will eventually make available for anybody to build. One issue is that it will incorporate a bunch of parts (resistors, jacks, speakers, etc.) that will have to be purchased. Are there any electronics suppliers that would let me create a parts list that someone else could order easily? The best solution would be a supplier that would potentially be willing to add any missing items to their inventory. (I understand that would be a long-shot; who would go through that much trouble to sell a few small items?)
SparkFun comes closest (they work with users to create products) but not quite it. Thanks!