They're not that hard to make yourself, Bronek. I just made some (because I'm now gonna be spear/archer) recently without any guidance save for pictures posted on the Wiki here:
http://geddon.org/index.php/Numenorean_Arrow . If you plan to make several, don't use the Edhellen arrow kits because it gets expensive.
Basic ingredients:
Arrow shaft+nocks+vanes (I get them from camofire.com, they have regular hunting deals every day and arrows sometimes show up for cheap. I scored 2 dozen carbon arrows for $50)
Penny
Duct Tape
Ozark Trail Blue Camp Pad
Cloth Tape from D!ck's (stupid word filter)
Fabric
Glue Gun
Green foam from JoAnn's
"Truth is beautiful, without doubt; but so are lies" - Ralph Waldo Emerson (1803-1882)