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 Brand Walkie Talkies, 6 Channel Citizens Band Transceiver, Never Used, Portable Two Way Radio, 5 Watt, 1990, TRC 220 - Etsy | Walkie talkie, Two way radio, Citizen band