The game's collection data lists Broker Translocation Matrix as sold by a vendor NPC in Heart of the Forest.
Vendor
Zone
Map
Waypoint
Other items it sells
NPC #175417
Heart of the Forest
-
-
175
Vendor NPC, zone and position come from the client's collection source tables (CollectableSourceInfo and CollectableSourceVendorSparse); coordinates are the in-game map readout.
Build history
First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
Items Numbered Next to Broker Translocation Matrix
Blizzard numbers items as they are created, so the named items next to ID 190237 (190231 to 190312) were usually added in the same batch as Broker Translocation Matrix: the same quest line, zone, vendor or reward set.
Enlightened Portal ResearchID 190234 · Miscellaneous · item level 60"Pages of thought droning on about the intricacies of hexagonal lattices, followed by pristine instructions..."