Negative voltage for a project

[Saitama]

Hello! I am designing a Lab bench power supply with OpAmps and i ran into a problem.
The problem is that i need negative voltage for a differential amplifier, so naturally, I searched for a 7660, but could not find any in my region and buying from Ebay will take an eternity so I came here to ask.

My input voltage is 32V and the Amp need -2V. I am looking for a circuit that is cheap and stable.
Any suggestion is welcome.
Thanks in advance!

[Benta]

If it's an AC powered bench supply, you can make a small charge pump from the secondary with two diodes and two caps.

[Saitama]

I already have a 32V unadjustable power supply, so i can't do that.

[xavier60]

A CMOS 555 could drive the charge pump. The CMOS 555 will oscillate properly simply with a resistor from its output to pins 2 and 6 tied together, and a capacitor from pins 2 and 6 to GND.
It can be powered with a dropper resistor and bypass capacitor with a shunt regulator across the -DC output.

[Audioguru]

I assume that your power supply will use AC electricity and a transformer. Then here is how a low negative voltage is made in another power supply circuit: