they are both in FGAddon, AFAIK... i mirror that repo here and both are shown in the list... the YASIM one(s) specifically state "YASIM" in their titles...
in the launcher, go to the craft tab and search for "dr400"... you might need to turn down or off the filtering so that all craft are shown instead of those greater than or equal to the filtering of craft quality options you've chosen... the filtering options are at the very top of the craft list on the [BROWSE] tab...