I had the same problem finding good angled MIDI jacks that kept things neat with my PitchFactor until I finally found http://best-tronics.com. They sell 8 way adjustable angled MIDI cables to any length you want, so you can get things set up exactly as you want. They are kind of pricey, but they're also the only place I've found that had exactly the type of MIDI cables I'd been looking for for a loooong time.
