I have found a few suppliers of slightly thicker wafer paper ranging between 0.27mm and 0.3mm here in the UK. However, I think you may struggle with suppliers of the 0.22mm due to how soft and delicate the paper is and how easily it can be damaged if it comes into contact with moisture. Hence, I don't seem to be able to find any stockists of that particular size.
I appreciate you want to use it to get the effect you want from your flowers, but I can only find the following for you:
Squires Kitchen does their own, and there's is showing at 0.27mm thick.
Squires Kitchen Edible Wafer Paper is a versatile medium that can be used in clever ways to add decorative touches to cakes, cupcakes and biscuits. It’s strong, flexible and ultra-fine, making it suitable for all kinds of uses in baking and sugarcraft.
Zoe's Fancy Cakes sells the Saracino variety of paper, which is showing at 0.3mm.
Wafer paper for creating your own decorations such as flowers, leaves and other decorative subjects. Create your decorations with this edible wafer/rice paper. Easy to cut and great for flat or domed cakes, biscuits and macarons. It is also perfect for printing various patterns to decorate your...
I know it's not exactly what you were looking for, but it's as near to it as possible as I can get.
I hope this helps, and good luck with the flowers.