Apparently it is being handled as a 1-off order and they are actually being made per my order. Seems kind of stupid to me, but it is what it is. I can't believe they don't have two displays sitting in a warehouse somewhere.
Edit: Just went and checked my order status (not like I was expecting any change), it's still listed as "Processing". But today makes one week since the order was accepted... Only one week, it feels like 3 birthdays have already gone by... This is going to be the longest 4-8 weeks of my life.