Hi hmorneau,
I hope that’s true because a lot of retailers I talked with aren’t happy with the PLB foundation (see post #5 here).
I don’t know the specifics of their new foundation but I think you’re probably correct that the Sleeptek will still be better quality although as you mentioned you would be paying more for the better construction and materials.
Natura also has a universal foundation that may be a lower cost if there are any dealers near you.
Phoenix