I'm afraid you are out of luck. A physical RDM (...-rdmp.vmdk) is nothing more than a pointer to the original LUN on the storage system. If the LUN has been deleted the pointer is worthless. And with the EVA storage there may also not be a big chance to recover the data (even for a data recovery company) since the EVA usually runs a leveling after creating/deleting LUNs to distribute the existing data evenly on the disks, so at least some of the data may have been overwritten by now anyway.
Your best (only?) option - in my opinion - is to recover from the most recent backup.
André