High voltage op amp rail generation
It depends on your ripple requirements.

Consider a  DC-DC forward converter with a synchronous or diode bridge centre-tapped 15 W supply to meet the load of 3.3W x 2 can operate using a step-up toroidal transformer.

With a turns ratio to create +/- 110Vdc using a sinusoidal or square wave frequency > =50kHz with high coupling to a well balanced centre-tapped ( input and output) for matched bipolar outputs but optical feedback from only one V-output. 

Design for 90 % efficiency and accept 80%.

Filtering must include degraded PSRR of the OA, at the switching frequency with harmonics but can be filtered by design specs for impedance ratios with a simulator for non synchronous resonance on Q filter peaks and with steep skirts using Falstad’s Filter designer.

BTW your step response has a 500 Hz resonance.