HD ready madness

As an early adapter I purchased a Mitsubishi Big Screen that was HD Ready - 1080i with componant imput. You know the story - everything is now HDMI etc. So my question is: does anyone know how to get an upsampled signal from a DVD player in 1080i through component inputs on the TV? Does any DVD player do this? Are there conversion boxes? I've heard there are security issues etc. Help!

I'm so confused I'm probably not even asking this right so please forgive my ignorance. Any help would be appreciated.