Where can I find a Status Quo?
Solution 1:
There's a few sitting outside of Safeword (the BDSM club you go to in one of the story missions), not sure if you need to do the mission before they spawn there, though.
Solution 2:
If you can't find any just use this cheat: givestatusquo. It is really cool and you can customize it too if you get it.
It will appear in any of your safehouses when you click it on the cheats menu. It will be on the vehicle section of your cheat menu.
Solution 3:
Every now and then they pop up on the bridge, around Rim Jobs, near a safe house, by Friendly Fire, and/or near your crib.