Maybe wait till you get the 44s you are looking to find and do it then. Anything you do for that D30 is a waste of $$ if you are planning to upgrade axles.
Big daddy's stuff is only for the tie rod.
If you want something bolt in look at the Currie setup, I normally keep on in stock. Otherwise, wait till you upgrade the axles and do your steering then
Yup, we build those all the time for YJs.......but he is still asking about putting a set of 44s in this YJ(in another post) so all the linkages would have to be redone when he did that........trying to save him from doubling up costs.
If you are dead-set on the D30, I think Down East Offroad makes a high steer kit, complete with knuckles... but It'd be pretty stupid to do that in my opinion if you can get a D44 and high-steer it for cheaper than the D30 high steer kit itself. But since you asked about the D30...