Going to reach out to see if there is anything ShopDisney can do, but since I bought it almost 3 months ago I'm guessing I am S.O.L.. 
Yep, pretty much SOL from Disney. All I am getting are robo-response of "items from this order are outside the return window".

edit: Just dropped $20 on a 'Best Offer' to pick up the R5 droid off eBay, basically just for the dome I'm missing. I really need to quit wasting money on this hobby...