Hi again leungwaiyuk,
Sorry for the wait. :)
I got a hold of one retailer I found online for these authentic designer reading glasses, and received an explanation on why these products cannot be available wholesale.
Prescription reading glasses are made to match and to aid the customerâ€™s visual/eye condition. These designer labels provide the licensed frames to select retailers, who have an in house team of optometrists and opticians, who can match the buyerâ€™s eye test prescription with the right glasses. The buyers will then choose what designer label frames they want their reading glasses to be in.
Here are some examples of online retailers who got the license to distribute genuine units of these designer products â€“
Link hidden: Login to view (since 2005)
Link hidden: Login to view (since 2007)
Link hidden: Login to view (since 2004)
Hope this helps. :) All the best!