I have what you are looking for. It was working when pulled out from my A2000 a couple of years ago, but I'd like to test it once more before selling it. If time allows, I'll do it in the weekend, and get back to you.
It is the hardware only though, meaning the A2286 with sandwich board, and the 5,25" floppy drive with cable.
I'll get back to you when it has been tested.