The written manuscripts and the sources for the non-gimmicked versions will provide you with a few tips on presentation no matter what version you perform. It covers the pen through bill effect, different stealing techniques for the tip, ideas for switching pens, penetration of other objects, and complete routines performed my various artists. The most common presentation amongst magicians is to ask a bill in order to test whether the bill is counterfeit or not. Minimalistic, simple and descriptive. I am really not allowed to tell, but here I am telling it anyway.
People enjoy stuff like that.
Also, after getting the bill you can lift it up in the air and ask the spectator you borrowed it from if this is the bill he gave you. If the answer is yes you start aiming for your pocket stopping before you reach it of course. Another thing I normally do is that I pretend to search for a pen. I ask for a pen and bill for the next trick. I find that the spectators start searching themselves and subconsciously states in their mind that I can use any pen.