Balam,
Sorry I have not been on the forum for the past couple of days and so I have not seen your post.
I ordered my stuff from mouser.com so I will gladly pass on what I ordered if you are interested.
The switch all depends on your pen design other than that I used the TSAL6200 led from mouser.com for its 17 degree beam.
depicted here in this thread
http://www.wiimoteproject.com/ir-pens/my-ir-pen-finally-complete-t537.0.html