I called Eibach a couple days ago. I read somewhere on this forum that they had somethin' brewin' for the Fox suspension setups. Sure glad I called! I spoke with a gentleman who let me in on some exciting news: One of their employees has a '19 trdp. They have been testing a front and rear coil (spring only) direct replacement!
He went into a bit of detail. The front spring is meant to satisfy additional weight from a front bumper / winch assembly. If I remember correctly : roughly 1 inch higher, with a 600 - 650# rating. ALSO -- Here is something new : they are developing an
adjustable rear spring replacement! He went on by explaining that the need for adjustability is to 'level out' the rear, when compared to where the front sits, as well as the additional weight load of RTT's, racks, etc.
This spring replacement system will supposedly be released in 'a couple months'.
Kudos to Eibach, and thank you to the gentleman I spoke with on the phone. He was very informative, and knowledgeable.