This is an aside from the original question; more about the theory of wye-delta starting than about finding the correct parts.
A motor configured for wye-delta starting is not so much two different windings in the same frame, but two different connections of the _same_ winding, to place different voltages on the coils.
In the delta configuration the windings are connected line to line, so each phase of the motor sees the full supply voltage. Say for example 480V line to line.
In the wye configuration, each winding is connected between a supply line and a common point. This common point is essentially a derived neutral. So with the above 480V line to line, each phase would 'see' 277V when the motor was connected wye.
The net result is essentially 'reduced voltage starting'. The motor will have _less_ torque and accelerate to speed more slowly in wye, however it will draw less stall current. Reducing the starting current, and perhaps the mechanical shock of too rapid acceleration, are the reasons for using wye starting.
-Jon
