Installation:

Download and install the TOS-1A mod here:
https://www.gta5-mods.com/vehicles/tos-1a-buratino-add-on

Use OpenIV and open: 

YOUR GTA DIRECTORY\update\x64\dlcpacks\tos1a\dlc.rpf\x64\levels\gta5\vehicles\vehicles.rpf\tos1a.ytd (make sure that "Edit mode" is enabled in OpenIV)


Import "tos1a_sign_3" from this archive into the .ytd and save.



Done!
