SE24 Source Code Based Class code in productive client?

Is there a way to extract source code-based format from a class, in a productive client? 

I have read-only access to SE24 in productive client.  The Source Code-Based button does not appear here (it does in development).  The option setting to start in source code-based view does not work in productive client.

SHOW_CLIF function in SE24 gives me a popup "SAP system has status not modifiable".  I choose display button and receive error message "Changes cannot be made, display user only" Message no. TR026.

Is there something else I can try?

Thank you for your help.