I'm in the wholesale plumbing & heating business. Ridge tools (Ridgid) has a "See Snake", a flexible, extendable camera tool with a few different 'snagging' tools for the tip (magnet, J Clip). If you can find a plumber who has one that you can borrow you are in fat city. The standard length is 3 feet but 3' extensions are available. The device has a pistol grip with small LCD screen facing up and the flexible extension extending from the barrel. They recently came out with a new model so old ones are going pretty cheap (~$200). Its a great tool for many applications (wires in walls, hardware that falls in the engine compartment etc). There may be other manufacturers with similar products.