Grrr...looking for case parts. Last night I relocated my piano black HR21-700 w/AM21 (moved to differant room) and I dropped the unit. The unit survived (works as before), but the little plastic door covering USB (front left side as I look at the faceplate) broke off. Any idea on where or how I can buy a replacement door cover? Murphy's law...when DTV raised the subscription fee earlier this year, I cancelled my protection plan to keep the monthly rate similar to before the price hike.