Best place to pickup a Smith Thunderbolt on the map?

[The Honeybadger]

I'm on mission 11. I see alot of different advice. So I'm asking all the top wiseguys around here. Help a fellow out. Where can I find this beauty?

[Gordon Ramsay]

Sometimes at the observatory good vehicles spawn. Near the downtown area/ by where vitos house is located is a good area

[The Honeybadger]

Thanks. Your a top fella.