At the present time what guns the CMP has are all they have. Reimporting Garands isn't that possible as they are in poor condition and not owned by the Korean government, making them a civilian gun that goes thru commercial channels. Not the CMP. In the past those guns that went that route weren't considered very good, a new category of "Trench" grade might characterize them. IE, found in a trench after a few decades and cleaned up.
If other Garands were sourced then it would be at least a year getting them thru importation back to the Army, release to the CMP, grading and reconditioning, etc. before the first come out, and the better grades will still be auctioned. There is a finite number of them and they are not going to last forever, we are now in the stages of scraping the bottom of the armories and for the most part I give them a few more years before they are completely exhausted. The CMP has begun limiting the number they will sell to one individual now, something that should have happened years ago.
Look to the 1911's for an indication of how this might work in the future. If this Administration can't pry them out of the hands of the Secretary of the Army to release to the CMP, not good. They are already sitting in their warehouses, it's just a matter of handing over title to them. Failure to do so will, in my opinion, endanger the existence of the CMP in it's entirety.
What we as shooters need to do is insist that surplus M16's be made available, roll back the ATF's attitude that "once a machine gun always a machine gun," offer kits from parts or whole weapons. All the CMP needs to do is physically remove the full auto sear and pin. All the ATF wants is to see the holes made to go away requiring a lot of work to restore them. It's not an impossible task. What might be hard, tho, it picking up a mint old GM or H&R as most were rekitted to A1 or A2 status and/or sent overseas as military aid.
Frankly, if we can't get behind the CMP selling semi auto M16's then we are dooming them to shut down in the future. And it will be our loss.