border-image: workaround for IE

Is there any workaround for IE which makes me able to use border-image? I'm developing a site and it's working properly in every browser but IE. I need to mimic these bars

I could use the ie-css3.htc hack but border-radius works only with the four corners together (which doesn't apply here, 'cause the top border isn't rounded) and the filter css property (for gradient) doesn't work with border-radius at all (it fills the whole element ignoring the border radius limits). In case there's no workaround for this, how would be the best way for doing this?