The best thing you can do is get a direct order to Hospira as soon as possible. They will fill direct before filling orders from wholesalers!
There is usually a fairly long wating period before you get your drugs, but still sooner than anyone wating to get it from Cardinal, Amerisource, etc.
I am also in the proverbial dire straits with succinylcholine. I have placed direct orders with hospira in mid July that remain unfilled. I actually borrowed some from a neighbor hospital on the premise that I would be able to replace it with product from a "gray market" vendor. That order never arrived. We have taken all the steps that we can to minimize usage and wastage, but are still a day or two from being completely out.
I am to the point where I would trade my bactrim vials!