one week for a custom made lengahs?!!....not long enough in my opinon. pehaps if you have a designer in mind and confirm it with them beforehand that they can complete it in time for you then you should be ok.
i'm going for roughly 3 weeks and think that itself may not be enough. am gonna go for the ready made option....theres so much variety out there.
if your goin lahore then check out the best places to go shopping. i've been trawling through the threads and looks like liberty market a v good place to start.
good luck tho hun ;)