coefficients as input to continuous time transfer function

I would like to create a continuous time SISO transfer function in Simulink whose coefficients are constant but given by the vector output of another subsystem. For example, I see that several of the discrete time transfer function blocks permit this kind of functionality by accepting coefficients from an input port. Is there a way that I can recreate this behavior for my situation? I am trying to avoid recreating the transfer function explicitly with integrators, gains, etc as I expect the order to be somewhat high.

Edit: The "Model Parameter Variation Without Changing Model Structure" example in the R2015 documentation for the For Each subsystem block is exactly what I want. However I am using Simulink R2012b. That only has partition options for the input and output (i.e. not for parameters). I would think that there should be a way to do something similar with mask parameters. Any suggestions?