EPM Support for Grandstream Devices

Is the Endpoint manager version you stated above (15.0.52) available to download in freepbx? We have a grandstream grp 2616 we are trying to get setup and it is not listed in our available phones list under endpoint manager 15.0.51. We are unable to fetch the new 15.0.52 version through module admin so Just curious if it is actually available.