the parts are listed on the TinyIR2 website I ordered it through Digikey
http://www.tauntek.com/TinyIR2-parts-list.pdf
Sadly the Schematic doesnt list the part
http://www.tauntek.com/TinyIR2-schematic.pdf
Oh one last thing I forgot to mention tauntek the makers of the board mentioned that IR Receivers can be purchased from Mouser electronics but I don't know which ones would be the best and sadly we don't have much time left for experimentation