I recently purchased an iMac (Oct 2011), and over the weekend the glass panel was accidentally broken. I can't seem to locate any replacement panels for its part number 810-3557. I'm considering purchasing the (mid-2011) 922-9833, but I'm unsure of its compatibility with mine. Does anyone have any ideas on this? Have they recently changed anything that would cause this to be incompatible? Should I be aware of anything when buying OEM off ebay? Thanks in advance.