Very low power, low cost AC/DC module

[superposition1]

I'm looking for an AC/DC converter module for PCB mount. I need no more than, say, 50mW (probably less). I also need it to be certified (CE/UL/Etc.) and to be VERY low cost: under ~$3 @ 1K units.
I couldn't find any solution for such low power. The cheapest 1W module I found was almost $7 @ 1K.
Anyone has any ideas?
Thanks!

 

[Mithun_K_Das]

It will be easy to find out if you can say the input and output of your circuit. You can use Transformer-less power supply. These are easy to make and will suits your requirement.

 

[D.A.(Tony)Stewart]

You can get an Offline converter packaged with wall plug and a 3W USB port for $3 then no need to certify board since it is low voltage.

IS there a compelling reason to make it PCB mount?