If you have perfect vision and only need the style of the glasses, you can get a pair of glasses with non-prescription. You can get them at any optical store. You can choose the non-prescription glasses online which is much cheaper than the real stores. But you should know your frame size and PD if you want to get them online.
Yes, you can buy glasses without prescription which are called non-prescription/ Clear glasses. Just choose any styles that you like and suitable for you, and tell the processor to put non-prescription lenses into that frame.