Understand the concern, at this current time and place, the option is not available and haven't seen it on any  lists for future updates as well.   Have a good day! 
 Is it possible to save/dump the flash/firmware memory?  It's a simple matter to upgrade (e.g. racadm fwupdate), or get the configs (racadm getconfig), but I want to get the actual firmware image from a system. Thanks!
Dump/Save flash (iDRAC5/6)