There are 46 character wands and 13 Ollivander wands (Ash, Alder, Birch, Elder, Hawthorn, Holly, Hazel, Oak, Reed, Rowan, Ivy, Vine, Willow) available for purchase. J.K. Rowling, by pure coincidence, chose Holly for Harry Potter because of to its evil repelling properties before knowing that it corresponds to his birthday in the Celtic calendar. Thereafter, she chose Hermoine and Ron’s wands according to this calendar.
You might try this method or enlist the help of a wandkeeper. Be prepared to answer questions like: “How old are you?” and “What do you want to do when you get older?” and “What house are you in?” and “What do you like to do for fun?”
If you buy a wand at Universal Studios Hollywood, it will also work at Universal Studios Orlando, too. The Diagon Alley map will not be included in your wand box but you can obtain one at any of the Diagon Alley merchandising locations or call guest services to have it mailed.