Yes, the 2nd piece is a shim. No idea what that first one is...
I had the EXACT problem as you on my SR. There were 2 shims in the oil pan and a hole in the screen of the oil pick up tube. The shim actually was sucked into the oil pump and cracked a hole into the front cover. Make sure you have oil pressure before starting up your engine! The hole in the front cover was behind the crank pully so i didn't see it until I pulled the crank pully off.
my thread is here:
http://forums.freshalloy.com/showthread.php?t=160528