Yes hamilys in London sells wands and other Harry potter stuff! :)
barnes and nobble
Quality Quidditch Supplies
Ebay.
In Diagon Alley, Flourish and Blotts. In Hogsmede, Scrivenshaft's Quill Shop
You are probably referring to "Ollivanders". Ollivanders is the shop that sells magic wands. The owner is Mr. Ollivander.
Madam Malkins
Though not all seven are available, the Noble Collection's Harry Potter shop sells prop replicas of Tom Riddle's Diary, Slytherin's Locket, and Marvolo Gaunt's ring (and possibly Hufflepuff's cup and Ravenclaw's diadem, I can't remember).
They started with selling a few products in Harry Potter and the Order of the Phoenix, but the real shop started in Harry Potter and the Half-Blood Prince.
The best place to find these are in the Harry Potter world in Universal Studios Islands of Adventure. They have the candy shop, wand shop, joke shop you name it. If you can't go inside the park, outside of it is "Citywalk". One of the stores there sell almost everything that is available in Harry Potter world.
Jokers' Masquerade is an online shop which sells costumes and fancy dresses for Halloween. They also offer themed costumes like Harry Potter or Disney.
a wand at Ollivanders Wand Shop, some candy and things from Honeydukes, some things at Zonkos Joke shop. Butterbeer and pumpkin juice. Basically an EXPERIENCE of a lifetime.