I am lucky enough to get my hands on a Realistic TRC-86, the walkie talkie they used in the series. Not sure if it works but just to have as display is
Realistic TRC-214 Walkie Talkie – RadioShack
3D model Realistic TRC-206 walkie talkie VR / AR / low-poly | CGTrader
Realistic TRC-214 80s Walkie Talkie - Buy Royalty Free 3D model by 3dtreatment (@3dtreatment) [946909a]
Vintage 80s Walkie-Talkie Realistic TRC-214 by 3dtreatment | 3DOcean