Hello & Welcome to Just Answer,
Sorry to hear of any trouble.
I can try to send you a link to the electronic (PDF) version of the guide, if that would work for you. Link is below.
As for finding the lost handset, what I would recommend is pressing the LOCATOR button on the MAIN BASE UNIT (just tap it), and that should make ALL handsets in the system "beep" for 1 minute.
If you have several handsets, you may want to put all the ones you have in a blanket (to silence them), or remove the batteries - so you can hear the lost handset beeping.
NOTE: This assumes that the lost handset has only been lost for a little while AND still has charged batteries.
Please let me know if you have any trouble seeing that manual.
Thanks, ***** *****