I'm happy to post that Karen Cook got in touch with me.
Karen found and passed along to me, TWO of Khodakhrome's rosettes!
(The two rosettes shown in the Liz Cassel photo with Khodakhrome, below.)

Khodakhrome Liz Cassel Photo 6p4uh3.jpg

I may never find his smaller ribbons or his Nan Cookie but at least I DO have some of this awesome horse's well-earned awards!
Thank you for your help and assistance Karen!
(If you're on Blab or can read this...)