I need to acquire a couple of "bucket brigade" IC chips for my son's Webelo troop. They are in an endeavor to attain some of their "activity badges" and my son has chosen electronics (which he has shown a great deal of talent in). He has done quite a few projects on his own but now is taking a leadership role in helping his brother Webelos put together an "Echo Chamber". If we can acquire these pieces he will be able to complete the schematic he pulled off of the web. So if anyone can help us (him) out it would be greatly appreciated. Also any messages with the history of these chips, and other erata with regards to "Echo Chambers" would be greatly appreciated. Thank you for your time and consideration in this project.