I need a power supply for an Asus router. I just moved houses and it vanished. I would just get a new one but I have 2 computers and 2 printers networked to it along with all the other ipads etc. I tried calling Asus and ordering 3 from amazon, none of them fit.

The problem is I need a impossibly small end to go into the router. It is the same cord that runs my ADT router for the alarm. I swear it must be 1mm thick.

Any ideas on where to find such a thing?

Sounds like a good candidate for Ebay.

I would start with what the router requires for power. Voltage, AC or DC (and polarity), and maximum current (or watts). Then look for a p/s that meets those requirements and has the correct sized plug.

Many are available that come with an assortment of different sized plugs. Some even let you select a voltage.