Curved Table Aprons

My next project is going to require me to do something I have never done before, bend wood. Atleast that’s the best way that I can think of to make the stretchers for this table. I was told that they want the diameter of the table to be roughly 18”, which got me thinking that through a bit of trial and error on some scrap I could cut the stock to length, machine the tennons on the ends and bend the piece to the desired curve using some type of a form. I know I can build my own steamer box, which I may do but is this the most sensible option? The wood they decided on was cherry.