I\'m up for a do-it-yourselfer, can you post a part list ! :wink:
It\'s been a while, so I don\'t know the Radio shack PNs, but basically, all you need is
1) 1 Battery holder for 4 batteries. Take your pick of battery size.
2) 1 tip. They come in 2-packs, and Radio shack has a lettering scheme for different sizes, I forgot which size it is, but it shouldn\'t be too hard to figure out. If you bring your Z to the store they can find the right one.
Solder the leads from the battery holder to the tip and that\'s it! You\'ll get 4.8V from NIMH batteries, or 6V from alkies. (you can add a diode to drop the voltage if you want)