Hi Snoresalot,
The topper and component reference post here includes the better online sources I’m aware of for latex toppers and components. Off the top of my head … I know that KTT Enterprises and Sleep Like a Bear both sell 1" Talalay latex toppers in either blended or 100% natural versions although some of the others may also sell 1" Talalay latex toppers that aren’t listed on their site.
Phoenix