I don't understand why one needs the DPA for this. Just issue a PO for a suitable value so that a vendor decides it is worth it economically. Attach the delivery schedule that is desired. If it isn't possible or it is a bad economic move for the company, then the DPA isn't going to work out well anyways. This is operations 101.

They tried to do something like this with Kodak, but the crooks at Kodak screwed it up.

The benefit isn't just applying it directly to the mask maker, it's also applying it recursively to everyone that does things the mask producer needs.

The mask producer needs a second production line, but the land they need isn't for sale? Boom, now it is.

The mask producer can't meet parking minimums for their new line, or haven't completed an environmental impact assessment? Start building, we'll take care of it.

The mask producer needs a load of elastic, but their elastic supplier is busy making sunglasses holders for a car maker? No problem, go ahead and jump the queue.

Mask factory workers can't get to work, because the busses aren't running, because it's not economic to run them? They are now.

Needless to say, with modern international supply chains this might be less useful than it has been in the past - no way to jump a queue using the DPA if your supplier isn't under its jurisdiction.

Rather than wrecking havoc by taking people's land and forcing changes to their production plans, how about just paying the true costs of those changes and everyone doing it because it is in their best interests? How much has the government spent on this virus to date? 3T? It would not be hard to pay the market rate required to make this happen. That is how EVERY other program, defense and space included, have worked for decades.