Play in ball joint

Hey guys, I have a 2009 Tacoma 4x4 with 60k miles. Just brought it in for an oil change and mechanic says I need a left lower ball joint as there is some play in it. I called Toyota for an estimate and they say they have never had to replace a ball joint on an 09 Tacoma and that it does not sell separately (comes together with control arm or something or other).

Questions are:

1) is it normal for there to be some play on the ball joint? If so how much
2) Anyone else have this type of experience?

Much appreciated

 

I would go this route if you are mechanically inclined.
http://www.tacomaworld.com/forum/suspension/171412-diy-lca-ball-joint-replacement-2005-tacoma.html