The Ikea twin duvet may be the closest - you can find them .

In Canada, if Ikea doesn't work you can have the exact size custom-made by the .

In the US, you can find European Single size down Duvets from The Down Comforter Store . 

  is a very fresh kids’ brand that produces high-quality clothing in creative and colorful patterns. They use only GOTS organic cotton of the finest kind for their garments. All the process, from the purchase of the raw materials, through printing to the actual sewing of the clothing, is being made locally in Poland, which means that they have full control over it. They can therefore guarantee that all of their clothing is produced in fair working conditions.

Their inspiration comes from a mix of Polish creativity: flora, fauna, and all the other things that surround us and a touch of Scandinavian design: half of their company has Swedish roots!