I believe the brand I have is called Look of Love. I ordered mine from a company that sold various types of hair extensions. I already had one of those pony-tail type clips by Revlon that matched my hair perfectly, so I emailed the company and they were able to advise me based on the color of clip on ponytail I already had (they sold that same brand). Although if it is a good quality hairpiece it should have various shades of hair mixed in (you can't tell though) and as long as you are reasonably close in color, it should blend in with your own hair. No one's hair is all one color anyway. Mine isn't an exact match but you really can't tell.
Also, mine isn't human hair and it looks great. There are pros and cons to human vs. artificial hairpieces. I did some research and eventually decided to get synthetic hair. I can't remember all the advantages but I do remember reading that human hair pieces are mostly made from asian (dark) hair that hass been bleached and recolored. The processing causes the hair to be somewhat dull. They don't have as much shine that synthetic pieces have, which is one thing I love about my piece. It's not that 'fake-looking' shine either...it looks very natural. Also, synthetic pieces are supposed to be less fragile and last longer although I have to tell you, this last one I have is a year and a half old and it is already starting to look ratty. I'm pretty rough on it though. For one thing, I use regular hairspray on it at times (a big no-no for synthetic hair).
I'll try to give some links so you can decide for yourself. I need to order a new one, and I'm thinking about trying one made from real hair this time. I'd also like to try the type with separate pieces like the set in your link...just to see the difference.