Hypersmurf
Moderatarrrrh...
Here's my rationale for not allowing something like a "race/class/feat component" to be added by a 2nd party.
Yup, I agree.
A spell prerequisite is like charging a battery. It doesn't matter where the spell comes from.
A skill or racial prerequisite implies a deep understanding of what you are working into the item... I don't think that could just be "channeled" by having an elf posing for you while you make your Cloak of Elvenkind.
Of course, I would allow a creator to make a Monk Tattoo as long as he added two finely-ground seventh level monks to the recipe...
-Hyp.