the images for notification center and folder located at bundles/com.apple.springboard
notification centerBulletinListAlertAccessory@2x.png
BulletinListCellSelection@2x.png
BulletinListCellSeparator@2x.png
BulletinListCornerBottomLeft@2x.png
BulletinListCornerBottomRight@2x.png
BulletinListCornerTopLeft@2x.png
BulletinListCornerTopRight@2x.png
BulletinListFadeMask@2x.png
BulletinListGrabber@2x.png
BulletinListLinen@2x.png
BulletinListLockScreenFirstAlertBG~iphone@2x.png
BulletinListLockScreenGrabber~iphone@2x.png
BulletinListLockScreenLargeAlarmButton~iphone@2x.png
BulletinListLockScreenLargeAlertButton~iphone@2x.png
BulletinListLockScreenLargeAlertCancelButton~iphone@2x.png
BulletinListMagicPocket@2x.png
BulletinListSectionHeader@2x.png
BulletinListShadowBottom~iphone@2x.png
BulletinListTab@2x.png
BulletinListUnreadAccessory@2x.png
BulletinListUnreadAccessoryHighlighted@2x.png
BulletinListX@2x.png
BulletinListXBG@2x.png
folderFolderDropBG~iphone@2x.png
FolderIconBG~iphone@2x.png
FolderShadowBottom~iphone@2x.png
FolderShadowBottomNotch~iphone@2x.png
FolderShadowTop~iphone@2x.png
FolderShadowTopNotch~iphone@2x.png
FolderSwitcherBG~iphone@2x.png
FolderTitleEditField@2x.png
plz add if anyone see any images missing from the list... i don't have siri so i don't know where the images re located.