Wow, Thanks so much. I had no idea that someone would reply right away with the same size washer. I really appreciate you measuring the dividers for me. Yes, I will first ask the somewhat shady eBay seller about the dividers, perhaps ask for a partial refund. My poor girlfriend bought this for me as a Christmas present and the guy was an ass with the whole process because she paid less than what he expected ($250, including shipping...in brand new condition - low dividers).
Once again, thanks for the fast reply. I am curious what expensive means. I'll call some glass shops tomorrow and see.