How to easily get -10V and 170V
OK the previously mentioned pump could give the neg 10V so here are some ways of getting 170 V DC.

Firstly you could use a ZVS Royer Oscillator, that's a simple two-transistor circuit  The sinewave output could be rectified with cheap BAV21 diodes and no output choke is needed due to the small current demand.The ZVS Royer is sometimes called a "Tuned collector oscillator".

The ZVS Royer is widely used in low voltage fluorescent lamps and is good with cheap BJTs.

The output volts aren't regulated, but if the oscillator is run off 5V you should get pretty stable 170VDC with appropriate transformer.

Secondly if you don't want to build a transformer, then it's feasible to boost convert using an off-the-shelf SMD coil. The trick here is to reduce the switching losses and use a diode pump to do part of the job.

I managed to run a Valve car radio tuner section making 220 VDC this way. NO heatsinks, but a small die-cast Aluminium box to have no birdies on weak stations was needed when on bench.