Hi energizedchriss,
You can see more accurate specs for the PLB Nature in post #2 here.
As you can see they are different in terms of layer thickness and ILD than most of the online manufacturers that sell talalay latex mattresses listed in post #21 here so you would their help to approximate or “translate” the design of the Nature into the options they have available that are the closest equivalent.
You could order the exact same layers from a supplier like Sleep Like a Bear and a similar cover but it would cost you more.
6" 36 ILD Blended Talalay = $1231
2" 28 ILD Blended Talalay = $ 481
2" 21 ILD Celsion (Talalay GL fast response) $ 553 (or alternatively 2" of 19 ILD blended Talalay for $481)
10" stretch knit cover @$ 200
Subtotal $2465
2" 14 ILD topper $ 664 (you could find this for less elsewhere)
Slatted foundation @$ 300 +
Total @$3429
You could also shop around with some of the suppliers in post #4 here and order some of these individual layers for a lower cost as well.
Overall though it would probably be most cost effective both in terms of time and money to talk with some of the members here that sell online and see what they suggested that may approximate the Nature and the topper although the savings for 12" of latex and a foundation may not be that significant compared to actually purchasing the Nature itself.
For example you could talk with mattresses.net and see whether they could add 2" of Talalay to one of their 6" + 2" Talalay mattresses in the same ILD’s with a stretch knit cover (instead of wool quilting).
The SleepEz 9000 may also be similar in terms of “feel” and the makeup of the top layers because it has 2" of similar ILD as the top layer and then a middle layer that is a little thicker (making it a little softer) but also a little firmer ILD (which may compensate for the softness of the greater thickness) and then the bottom 3" would also be firm (although it would be 3" less but the bottom layer contributes less to the “feel” than the top layers).
In other words … approximating the Nature could involve some research, some conversations, and some guesswork (see post #9 here). I don’t think you would find all these components, layers, and toppers, and a similar cover in the same configuration for close to $2000 even if you found the best prices for every layer and component and to reduce your price to that degree you would probably need to find a rough “equivalent” that used less latex and/or different layering.
Phoenix