i'm new to this sight. i have found it very helpful so far. here's my question. i have a chinese norinco sks. i have lost the U shaped piece that connects to the rear of the upper hand guard next to the hand guard catch. i believe this piece is called a hand guard ferrule. i have been unable to find one locally and will need to order one online. any help with the correct name of this part and or a place to order one would be greatly appreciated.