Hi maryc,
The topper link in my last reply to madinsomniax may be helpful for you as well.
FBM doesn’t sell Talalay latex although they claim they do. As you can see in post #2 here and post #2 here I would be very wary in dealing with them or trusting that what they say they are supplying is accurate.
SLAB is the only source I know of as well that sells 1" Talalay latex toppers. Rocky Mountain and Nest Bedding sell 1" Dunlop toppers.
Phoenix