I had to have some custom mounts created when I installed my Kirkey seats. This sounds a whole lot easier. Sounds like the first run sold out on FB, but they planned on making more. If anyone knows of other sources, feel free to post up. As of summer of 2017, Kirkey did not have a specific S-197 bolt in mount.
https://www.fathousefab.com/product/2005-2014-mustang-kirkey-bolt-seat-mounts/
https://www.fathousefab.com/product/2005-2014-mustang-kirkey-bolt-seat-mounts/