Barrty, I got this one at Amazon, and I'm very happy with it.
http://www.amazon.com/gp/produ...00?ie=UTF8&psc=1
I have a Standard Gauge layout, and okay, I'm not picking up standard gauge locomotives with it, but cars yes - the grip is a soft rubber that grabs very well without having to crush down on it. Lightweight, strong, easy one-hander. Three feet plus your arm reach pretty much gets everywhere. I was setting some tiny delicate scenic items with it the other day; a test for my coordination and steadiness, but the gripper worked beautifully.