my wife has a classmate at palmer chiropractic college west that does hemming for her. i don't know this woman, but my wife does, and she did an attractive job on my wife's 7 jeans. however, i fear you're looking for a seamstress for a wedding dress, which is maybe more mission critical than a pair of 7 jeans.
well, i have a couple of old friends who own a chain of dry cleaners, one which is found somewhere willow glen and the other which is found on san tomas aquino in the same strip mall as tsingtao korean.style chinese / beijingese restaurant and sushi zone, the korean sushi joint. uhm, i forget what they call their chain, but the owners are joan and chris. they don't have a seamstress (or a seamster... let's not be sexist here) in their shop but send it out to some woman who does it for very cheap.
yes, i do realise this post is barely informative, but it's like how a fish needs a bicycle, you know?