Sarco has some Para-Ordnance LDA frame castings on sale. These include castings for the 12.45 LDA, 13.45 LDA, and 14.45 LDA. Since these are castings, I don't think they would be subject to the new BATFE regulation that goes into effect roughly four months from today (but I am not a lawyer, so I'm not certain of that). These are definitely NOT 80% frames. And, because they were intended to be used for LDA (double action) pistols, some additional machining would be needed in order to use them to build conventional, single action pistols from them.
If you are a machinist and want to make your own double stack 1911, here's your chance.
https://www.sarcoinc.com/1911-p14-ty...ast+04-15-2022
https://www.sarcoinc.com/1911-frame-...ast+04-15-2022