From my understanding you want to feed inputs from one Discrete-Event System into another Discrete-Event System. For that you can try the 'MATLAB Function' block. You may be able to insert part of your script into the function (double click on the block) and this will execute on every Simulink time step. So, if you can make the function capture and return a datasample then you can feed that into your Simulink design.
You can also look into Record block in Simulink to record the values of your Discrete-Event System and later feed it into another Discrete-Event System if they are independent.
