I have not tried this, but check it out:
# perldoc /usr/lib/vmware-vcli/apps/vm/vmclone.pl
NAME vmclone.pl - Perform clone operation on virtual machine and customize operation on both virtual machine and the guest.
SYNOPSIS vmclone.pl [options]
DESCRIPTION VI Perl command-line utility allows you to clone a virtual machine. You can customize the virtual machine or the guest operating system as part of the clone operation.
. . .
This is installed on the vMA.