I managed to damage, irreparably, the tiny little black plastic power switch, and it seems like that's the only piece of the iPhone you can't get online someplace. At least nowhere I've found. The part is the little black thing that protrudes through the hole at the top of the phone, with a metal loop that is secured by the clip on the power on/off microswitch.

If someone has a phone they purchased for parts, or a smashed one that still has this part intact, please PM me - I'd be most appreciative. Or if you have an online source for this part that'd be good too. Thanks!

Only place I know that you'll get that part is off the headphone jack assembly. You can get that from ifixit.com or ipaqrepair. Unless someone else here has that part you need but its part of a ribbon connector which may be hard part to remove successfully.

You can buy a complete rear cover with switches installed for about $37

Embassy - PM me - You can have one - just pay shipping