I found a (partial) solution to my problem, should anyone else be in need of a similar application.
It is sufficient to place an unbuffer block before the Simulink Real-Time Scope to obtain a result similar to the array-plot, provided that the size of the frame inputting the unbuffer block be the same size of the "Number of samples" field in the Simulink Real-Time Scope.
I still can't visualize both the arrays in the same scope, but the current solution is good enough for me, at the moment.