Flyback isolated Controller

Hi Everyone.

I am writing in order to ask you a question regarding my work. I am currently working on a project in which I try to find the proper flyback regulator or flyback PWM controller. I would acknowledge if you could suggest me any probable IC with following criteria:

Vin= 12-36V
Iout =100-120mA
Vout= 24V or +/- 12V
Price = 1-1.5$

I have seen and simulated on LTSpice the LT8304 which is rather expensive, but I prefer a cheeper alternative max. 1.5$.

Many thanks and looking forward to hearing from you,

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