Is there any old style keyboard (numpad style) available for Android?
Well...Look for a keyboard that has a T9 layout.

As an example, I use Smart Keyboard Pro (which is a paid app, but a trial is available) and you can choose from the full, T9 and compact modes for portrait as well as landscape orientation. There are tons of other customizable options and considering that a keyboard that one is comfortable with, is what allows one to at their productive best, I opted to buy the full version.