Thanks Robert!
Those solutions might work, but the unit prices are quite high. For comparison sake, I found a Chinese circuit that does exactly what I want called the C005 (see links below) for <$0.13/unit. Are you familiar with this? I believe that it’s probably a similar, but simpler circuit to what you proposed all integrated into one Silicon chip with external R for setting the time delay.
https://www.yoycart.com/Product/25455272178/
http://www.talkingelectronics.com/projects/50%20-%20555%20Circuits/50%20-%20555%20Circuits.html (the circuit is demonstrated on this Hobbyist’s page)
Let me know what you think. Thanks again for your help!