Supercapacitor electric model
Here is a model and a paper you can use:

There is also a paper (Modeling, Evaluation and Simulation of a
Supercapacitor Module for Energy Storage
Application)

If you don't have the ESL, it could be measured, or estimated. If you know something about the physical construction of the capacitor for example (like the terminals or metal or even take the capacitor apart (not recommended, but I have done similar things to model other components)). By knowing the physical construction, you could estimate the inductance of the metal in the system. Again I'm not saying do this, but it can be done. 

A better way would be to run tests with the model below doing a frequency sweep and then fitting the modeled data to the parameters of a super capacitor



Source: How do you simulate a supercapacitor in PLECS? or in MATLAB for that matter