The US needs way more missile production capacity for its confrontation with China. This is not a short term issue. The first step is to give Raytheon a large order book for these, to pay for increased capacity.
You are focusing on the short term, we should be looking at the medium term.
And don’t go on about defense industry political kickbacks from Raytheon. If you are serious about China then you have to deal with Raytheon.
Personally I would ask Musk run Raytheon, as a national emergency measure, but I suppose he has better things to do.
The better alternatives can include Raytheon upgrading their tech. But more likely it will be something other than Raytheon missiles.