As far as I know, that's it - for a full top. It comes with all the hardware, so theoretically, you shouldn't need to purchase anything else - if I understand their writeups. There is another supplier for bikini tops that was posted here a while back:
https://cj3apage.com/Forum/index.php?topic=5078.msg39378#msg39378If you had original bows, you'd have a few options on canvas top vendors but they're not as easy to put up/take down, i.e. convertible. I will mention that I've read about tops being made overseas (India, I think) but I think it's best to deal with a company state-side in case you have issues.