Visited your site. It seems that you make a lid for the Aqueon 40Breeder, but not the Aqueon 75 gallon. When will lids be available for 75 gallon tanks ?
They have a "custom lid" version on the website, that when you click you simply enter the length and width, and they will custom make it to any size. So they may not have a pre-made Aqueon 75 gallon ready, but they can make you one with the measurements.