I missed both Mace and the ARC Trooper during the pre-orders. I added these to my list on the Walmart app, so I can periodically check the online listings. So far I haven't seen these come back in stock since they were initially offered over the summer.
The execution on these looks better than I had expected. I actually really like the way that Grievous came out, and thankfully that's the one figure I was able to preorder.