Can be obtained via the ship technician
Some Trivia:
Roman’s Taxi is the first vehicle that is driven in Rockstar’s HD universe.
Roman’s Taxi can be painted in a total of 5 different colours at any Pay N’ Spray.
In the mission “The Cousins Bellic” Roman’s Taxi is all black and doesn’t feature a mismatched quarter panel.
The default radio station in Roman’s Taxi is Vladivostock FM
Credits:
Satou
Rockstar Games for the model of Roman’s Taxi