To do all that, they're probably going to need a lot more metallic hydrogen than was lost in the accident. So I'd suggest the scientists concentrate upon making more metallic hydrogen.
. Luckily, once they've solved the trivial problem of how to keep metallic hydrogen viable at room temperature/pressure they'll be able to use the almost unlimited supplies of metallic hydrogen available to help build more metallic hydrogen manufacturing equipment. Out of metallic hydrogen. . iow, don't cry over sublimated hydrogen.