Flex Fit caps

Does anyone have any brilliant ideas for hooping the back of a flex fit cap? I need to fit the words "TEEING OFF 50 YEARS OF SPORT" on the back of a bunch of them.

Location: 
United States

What I do is use fast frames, and sticky backing. I put the sticky backing on the round ended hoop and lay it on a piece of wood the same width as the hoop. Then I position the FlexFit hat on the hoop where I need it. To make sure it stays put, I then use small clamps to hold it in place around the edges. It works great.

Also, If you need to, you can split the sentence and put it in two lines with this method.