Here are the locations that carry Nicole Miller in Houston, I would just call ahead and see if they carry her bridal line:
Saks Fifth Avenue
10609 Town & Country Lane
Houston, TX 77024
United States
(410) 297-5299
Tootsie's
4045 Westheimer
Houston, TX 77027
United States
(713) 871-9993
Nordstrom #730
5192 Hidalgo Street
The Galleria
Houston, TX 77056
United States
(206) 303-1080
Neiman Marcus
2600 South Post Oak Rd.
Houston, TX 77056
United States
Maison De Mode
2431 Rice Blvd.
Houston, TX 77005
United States
(713) 527-8285
Hemline
2505 Amherst St.
Houston, TX 77005
United States
(504) 529-3566