From past experience, most Movie/TV Production companies Rent radios.
Years ago they were all found in the VHF Bands 150-174 [mostly the 173 area] in recent years they have appeared in the 450-470 Band. Most at 12.5 Khz, however just this past month we saw some using older 25 Khz channels.
Search the entire 450-470 band, even the 465-470 [typically inputs] which will be used simplex. You need to be within a block or two,as they are typical 2-5 watt portables
Good luck