To get the same shape, you could cut the wood into thin strips and glue them together whilst bending them around a form (ie diy glue-lam). I can't get the photo to zoom, but it looks like there may be a join above each leg / main upright, so they probably weren't done that way. To follow the original you could steam each piece and bend it, or just cut a bent shape out of a larger piece of timber (profligate amount of wastage).
I did a bit of bending glue-lam last summer, and it was much easier (and much messier) than I expected. You just need a LOT of clamps, and polyurethane glue rather than pva. If I was going to copy this design, that would be my preferred option, even if it isn't pukka.