In general:
- Two detuned sawtooths, or a sawtooth and a moderately rapid PWM
- A moderately deep vibrato at a moderately fast rate
- Very little or no filter modulation from the envelope
- A moderately slow attack, and a moderately long release in the VCA envelope
- A bit of filter key amount to slightly brighten the upper end
If possible, give us an audio example of what you've made so far, and we can guide you from there.