You can check online, with a change of location on the Dior website. It will show the Fr prices in Euros and you can compare to your country's prices. I'm not sure if they can complete the embroidery in one day, I didn't ask how long it would take when I was there. However if she likes, she could check out the items which are exclusive to the Montaigne flagship store. They always include a few bags for each season and might have a unique book tote on offer. Good luck!