I've seen some beautiful ones on Amazon.
You can find some at Hobby Lobby and Michaels.
Etsy also has some beautiful flower transfers.
Here is a link to all kinds of them. I am sure you will find something you will enjoy: Flower Transfers
Amazon has a nice seletion
Marie: maybe this will help
Hi Marie, there is a company called Iron Orchid Designs (IOD) and they make gorgeous floral transfers (in colour and grey). They can be purchased online or from all kinds of small businesses.
I've found the most beautiful ones in small shops on Etsy. You can also search the hashtag on Instagram, lots of shop show their products there, too.
Amazon has some or look at Michael's
They also have them at Hobby Lobby and Michaels near the stickers.
Look on eBay, Craft stores and Wallpaper shops and Hobby shops.
You could go to michaels crafts or go on eBay.