I'm not sure when these NPCs become available, but as of today (12/11/2022), on the Mischief TLP server, this "Research Supplies" vendor is not yet available.
in pow use the Find button or from small bank walk outside and keep walking East past Caden Zharik the gnome u can see and at end of building turn left = North she the 3rd of 4 traders Or she at Loc= neg297 by 723 by neg91