Yes, it looks like a 1:2 unsymmetrical current mirror, correctly represented by three transistors of equal area.
At least two transistors (Q14 & Q35) apperently intended as as Z-diodes won't be simulated correctly, because the SPICE transistor model doesn't include a base-emitter reverse breakdown voltage. So the DC operation point of some circuit parts will be wrong.
Furthermore, most transistors of the NE565 monolithic circuit will have an area, that's only a small fraction of the used types. It can be adjusted by using an area factor. Also the low ft of lateral pnp transistors (about 5 MHz) should be considered for a realistic simulation.
I guess, that the 2Nxxxx transistor will mostly give correct circuit operation at lower VCO frequencies, but the Z-diode function should be supplemented.