No you cannot buy them at the DMV.
I was on the wait list for that legacy program.... not sure that will actually play out. Does anyone trust the DMV?
If you want to do it now, you need to buy some unrestored or restored black plates that are "clear" with the DMV and they will let you reappropriate them.
You also need to buy a year correct sticker to put on it. It's a
I just did this last year. It all comes down to how much you want to spend for nice plates, or junk plates, and either restore them yourself or have it done.