Don't panic. All previous posts are overkill. New ratchet, half moon clips are unnecessary.
I have some full moon clips with hexagonal center openings that are plenty large for the round ratchet on MY M25-2.
Unfortunately, they are loaners replacing gear lost in The Incident and I do not know what brand.
You can definitely get the S&W brand
FITS: 25-2, .45 ACP; 625-2, .45 ACP
Ranch Products originated the full moon clip and can probably provide the same style for less money.
But you will have to call, they don't seem to have a www catalog.
Rimz plastic clips are model specific, but they make both types. You need the 25, not the 625.