I was looking on the 83xx theme forum and found the 3-free-precision-zen-themes-curve-os-4-5-boldlike-stormlike-8900like theme (sorry, I am ot able to post links)
I tried this theme on my 87xx and the only problem really is the lack of trackball which will not allow scrolling through the bottom icon bar.
Does anyone know how to solve this? Or can someone contact the tehme maker and work on a 87xx compatible version?