I think one could get a similar effect if one purchased a border type print for the outside.
I don't know the name of the sashing they used - but it looks like it would be fairly easy to do with strip piecing.
Three strips alternating with 9-patch posts.
Will just have to wait and see what comes back - and play with them for a while to see if they have an idea of what they want done with them.
And there is no law against making a few more to "fill in" - - - -
In a way I now wish I had made another set to get more back - but I was SO relieved to finally get mine done (late) and sent to KLue.