User blog comment:PitchBlack696/Monster Hunter Portable 3rd/@comment-124.82.54.39-20101202000230/@comment-173.174.248.224-20101202010554

It doesn't exist. For the time being, firmware 6.36 is only available through the UMD. The most recent CFW is 5.50 GEN D-3. Just going to have to wait for a workaround.