Hi LJGMDAD,
It would depend on which specific OMI mattress you are trying to “match” because they use different types and combinations of latex but if you are able to find out the specs of a specific OMI mattress (see this article) which is unlikely (see my reply to your other question here) then you would be able to check the websites of the online manufacturers/retailers that sell latex mattresses to find out which of them use the same type and blend of latex but you would need a more detailed conversation with each of them to help “talk you through” which of the options they have available would likely come the closest because none of them have the same layer combinations as the Flora Noveau and most of them are also a one sided design so there would be some significant guesswork involved in which of their mattresses would come closest when two designs are so different from each other.
The Flora Noveau uses 100% natural Dunlop that is certified organic so if you are looking for organic latex then the three manufacturers on the list that have it available include …
https://www.foamsweetfoam.com/
If 100% natural Dunlop that isn’t certified organic is also acceptable to you (see post #6 here for more about organic latex) then you would have more choices available because any of the online list that carries 100% natural Dunlop mattresses would be an option but again none of them would have a design that is the same as the Flora Noveau so here too there would be some significant guesswork involved in which of the options they have available would be the closest.
Phoenix