How can I replace the crystal on a New Era Zodiac Sea Dragon Dive Watch?

I have a Zodiac Sea Dragon Dive watch (ZO-2201). These are the Zodiacs that were bought out by Fossil in the 2000's. It's a quartz watch with a thick ss case and screw back. I need some assistance on the removal of the diving bezel and crystal replacement. It's a big mineral crystal. Does anyone know where I can find a crystal for this watch? I have the watch back removal tool,but need to proceed with the crystal r and r. It's an incredibly good and tough watch,with a swiss quartz movement. Any help would be appreciated. Thanks Mark