Help me find a power adapter tip for my ASUS Zenbook UX31E

[titan97]

I have an ASUS Zenbook UX31E. Unfortunately, my kids like to step on the tip of the power adapter, breaking the barrel connector. After purchasing 2 new ones (and history repeating itself), I'd like to see about purchasing just the tips and I can solder them to the existing power supplies. The barrel is 3-conductor, with a 3mm diameter and 8mm length.

 

[tordogs]

Almost no luck finding the 3-conductor tips--found a few 2-conductor which are likely used on the aftermarket variety chargers--think the tip is 3 x 1.1 mm. Even then the tips are about $2 each and the vendor has a $20 minimum purchase--almost cheaper to buy the real charger and know that it works and save the effort.