Gravel drop bars. 25.4 mm clamp, 50 cm wide?

It’s a lovely bar and I’d snap it up but I have a 25.4 stem (clamp) that’s very pretty, I’d like to use it, and the Rune bars are 26mm.

I guess I could force it, but I don’t want to mash anything up, which is highly likely. A 24.5 bar and 24.5 stem clamp would be the way to go if possible…