Hi, I believe you can find the block you are mentioning in these location, Open the simulink library and search in this location
Vairable Inductor : Simscape / Electrical / Specialized Power Systems / Fundamental Blocks / Elements
Nonlinear Inductor : Simscape / Electrical / Specialized Power Systems / Fundamental Blocks / Elements
Refer the below links for the documentation of these blocks,
With the help of PS-Simulink/Simulink-PS converter block you can also use the linear inductor model (blue color models). The PS-Simulink block will convert the physical signal into a simulink signal. For more information you can refer this documentation,
Alternatively you can also use a Series RLC block with Resistance set to zero and Capacitance set to inf. You can refer the below link for more information.