I want to adapt my cell phone to old style handset

General Questions
#1

I only use cell phones these days because the usage charges are far less for me than land lines. But I like the handsets for landlines. Does anyone know of any system where I can plug my cell phone into an old style earpiece and mouthpiece? And no, don’t send me to a crappy Bluetooth system, I want a real earpiece et al.

#2

http://www.thinkgeek.com/gadgets/electronic/8928/

http://www.thinkgeek.com/gadgets/electronic/7830/

Something like that?

#3

http://www.smarthome.com/9621/Universal-Desktop-Station/p.aspx

#4

Yes. Your Google Fu is masterful!