Yes you can.
You would only have no status LED-function and ofcourse will be missing front plate. But if I remember correctly some drives were of identical type (some Chinon models like FB-354), so if you compare two and see more similarities than differences, you can swap that small pcb with led from old A2000 drive on A500 drive, then swap top metal shield so you can install that original front plate from A2000 drive.
Hope this helps.
