You may want to email
[email protected] and explain your situation.
US is definitely under some kind of backlog right now, orders from the 5th still aren't shipped.
Probably tied to the Sith sale, recent weather here in TX, etc.
Since you're just needing a metal part, that seems a simple order to fill, but maybe they've been working sequentially.
Shoot Marlena a nice email and explain your problem, and I bet US will scramble to help you out.