I believe the model number is Microsoft 4000. It doesn't have to be that one, but it has to be one similar where there is a split down the middle of the keyboard for the left and right side. I don't need the one that is actually two pieces... just the regular old kind that is split keys. Color doesn't matter and neither does input (USB or serial is fine). Thanks!
I have a Microsoft Ergonomic Keyboard I'll sell for $36 dollars. I'd ship it for free since I have a friend at UPS.