Lower BJ Replacement

So the lower ball joints on my Dart in my sig is bad. I can't justify paying $200+ at Autozone for ball joints just because they come attached to that...... "thing"

BTW, what are the things the lower ball joints pressed into called? It's not control arms or the spindle... Steering knuckle? Steering arm? I can't get proper terminology going here.

So yeah, I'm not spending money to buy a ball joint and a new steering thingy since my old steering thingys are still good. Does any company out there just make the balljoint itself that you can press in and out of the steering thingys?

If so, how do you press out/in the balljoint?

Thanks in advance guys.