Missing buttons

This soft cardi has had the knitting done since May, however, for reasons unexplained I did not seam it together until quite recently. While I was seaming, I was also looking for the white buttons that I got to go with it. Buttons... Can't seem to find them anywhere.

I have tossed my stash, which has grown quite a lot this pass year. I really need to work on that as it is getting out of hand.

I have checked all the other assorted baskets around the house and knitting bags that I would put the buttons in.

I can't seem to find them

So I figure this leads me with a couple of options. A) go buy new buttons now, B) wait a couple of more months - I am thinking of October in the hopes that the buttons are found.

Project specs:
Pattern: Soft Cardi in a Knitters Book of Yarn by Clara Parkes
Needles: Size 4.5 mm
Yarn: Rowan Cotton Rope