Here go put it on your phone, if the seniors have one. And if they're in the iPhone cult they're out of luck.
http://www.teamusa.org/USA-Softball/...es/Mobile-Apps
How about you type up the senior rules that you use and make them available that way? I'm sure if you have a free grounds crew and you're working with seniors, someone will sit around and type up the rules for you. Just be aware that ASA WILL come after you. They take their softball organization very seriously, even if you think it's just a little PDF.
Here's you a 2013 rulebook for $9.99
http://www.ebay.com/itm/2013-Partici...item4adaf9edf4