To Khun Dum,
If you have a new dvd player and new projector, they should already have DVI connections. Just use DVI, it's much better than component.
But if you want component, and don't mind used cables, i have 2 famous brands for sales at very cheap price (Better Cable Silver Serpent and Canare L5) because i don't use them for quite a while, both are in excellent condition.
If you are interested pls let me know.