Getting a belt case for the HTC Desire HD, fitted with a OtterBox Commuter case is not the easiest thing. I went to several stores, and eventually scoured the entire Greenhills. For the past few months I have been using an old belt case which I used to use with my Nokia E61i, but it is really looking old now, but I have little choice.
Going online, I found NiteIze's Large Clip Case Sideways. Fits perfectly.