Tatting Tuesday - Running out of Thread

For my latest tatting project, I was working on a border out of one of my Grandma's books (Orkis, by Nikolajsen and Nikolajsen). The pattern is for a handkerchief border (in 70 weight), but I decided to try it in a much larger multicolored thread, and make it into a picture frame.

Border/Frame

Unfortunately, at this point, I have run out of thread.  And, of course, this was all of this weight and color pattern of thread that I had. So now the question is, what can I make this into?

I'm thinking the best option will be a different shaped frame, something like this.

Curve the two long sides into an arc, and join the short side to make a base.

Any other ideas come to anybody's mind?

Larry