Sure, I expect you are best with a search, this module (and its friends) can be found with a search of "Negative Voltage Dual DC 12V", the specific one I bought is here:
it may be cheaper at one of the other places selling it, I was already buying something else from them and didn't look for lowest price. This is one of the more expensive ones for if you need highish current (remembering that the input current at 5V is going to be about triple the output current) and good regulation. For normal tasks the cheapie is my choice (only 30ma each side but 1/3 the price) search for "DC 5V TO ±12V Mini DC converter" although you have to dig down a bit to find the actual dual supply ones. Again I got mine from here:
At less than $2 each (against $8 or so for 1 of the better one). If you need high current I'm not sure a couple of 2 or 3A boost adjustable boost regulators aren't a better bet (+12 is obvious, -12 you make regulated +5V "ground" for the module and gnd the +VIN (which to the module looks like +5V in and set the output voltage to -17V (giving -12V at the output relative to circuit ground which is +VIN to the
module when you subtract the input voltage from the output,). The boost regulators are only a couple of bucks each for 2 to 3A output (again noting you are going to need 3 times that on the input side assuming you use 5v in, which is getting quite large). If you need very low noise output, these are available at up to +-24V output and can then be used to drive a 78L12/79L12 (from the +-15v module)
or 78L15/79L15 linear regulators (from the +-24v module). I haven't yet got these so there isn't yet a
Again these are quite expensive, but if you need the power and/or the low noise they are an option.