First time here. I spend most of my time on the s&w antiques forum. Can anyone steer me to where I can get a hand spring for a model 642-2? Brownells shows it as part #3o, but they do not have it in stock. Where else can I turn? This is a fairly new gun that I got from a 92 year old friend who lost the part when he disassembled the gun some time in the past. Much obliged. wormey