Not enough manpower at the moment, for sure, but we should create it through education and social investment. It's generally a strategic advantage to have manufacturing capabilities no matter what discipline; it's less that we are reliant on China for this one particular thing and more that we have allowed our once-strong manufacturing muscle to atrophy. We subsidize gas heavily because it's a strategic advantage to the nation; call it a hunch but I think there are more knock-on benefits to being able to make stuff than is readily apparent (and I thought such a view would be more popular on Hacker News to be frank).