It might be a case of buying longer and altering. I could make a scarf!
It's actually really simple to sew a kimono. The simplest pattern is just an oversized rectangle or T-shape. If you can sew a hem, you can sew a kimono.
I have some made up in Liberty print silk. I waft around London in them in the summer with jeans or a slip dress. Bars, restaurants, parks, museums, galleries, the tube, even the supermarket.