I finally got the email from Jina today.
The good news is at least there was constructive criticism in the email.
The bad (expected) news is that they are not accepting my designs.
I knew that's what the email would say. I just needed the door fully closed.
I have already contacted a half a dozen other manufacturers and will send off the designs to Robert Kaufman Co. tomorrow.
It will happen. But not if I give up :)