I still think cloning is the hard way, and they could probably get viable eggs and sperm from recent finds.
I know of a few groups (incl Penn Univ) who have been warming this up for 10 years. They got the Mammoth sequence done first, just needed to complete the African elephant. So the sequencing part is done as far as I know. I haven’t heard yet about finding viable sperm or eggs, but its possible.