With less work then it would take to find the parts elsewhere, just ask stores the do photo processing if you can have a few. Might have to talk to a few different employees, try a couple of different stores, but they will give them away free. You can use them as is, or strip the parts you need to build your own. Several surplus sites sell them for a buck or less. Surprised somebody hasn't cashed in on this with Ebay. If the worked at the store, or had friend. Free product, sales price + ridiculous shipping charges = easy money. There are a lot of coil gun, shockers, strobe projects using them on the web, it would be easy to attract customers...