[sdiy] 3.3V regulator ?

[Linium]

Hello,

I need a 3.3v regulator for a DIR1703 (a spdif->i2s/serial convertor made by 
Texas Instrument). The problem is i don't find this kind of regulator. The 
circuit board will have this chip and a DAC plus minor parts and that's all. 
The DAC needs 5V, and only the DIR1703 needs 3.3V.

I know this kind of regulator does exist but simply are hard to find, i was 
wondering about alternatives.

Given that the DIR1703 needs around 50mA for its power and that i don't need 
top notch parts since the DAC will be used for DC signals, can i :

-use a divider bridge with resistors from the 5V power line to make 3.3V 
-use a AOP for the same kind of thing (problem the supply will be 0-5v)
-use a regulator with variable voltage out, i just discover this possibility, 
there seems to have some regulators that can be "tuned" with a resistor to 
produce a voltage in a given range. I don't know at all if they are good or 
what.

Thx,

Linium