Briefly, there may be opportunities for co-operation among allied defence industries. It would be worth looking at whether there are bottlenecks of inputs.
I think Mr. Kelly's remark about preparing for the future is very important, too. Here at RAND, we joke that every sentence and every statement about security should end with “buy more munitions”. They're going to be important.
I would investigate the defence industrial base and whether there are any additional legal authorities akin to, for example, the U.S. Defense Production Act that would help do that.