If your heart was really set on that BJ's Knuckle setup you may want to give PartsMike a call.
http://www.partsmike.com/store/store.ph ... how_detail
I think the only difference is that BJ's has the drag link arm either tapered for our TRE's or a bung welded in to match (been awhile sine I looked closely at how they did it but I will be wheeling with one tomorrow and try to remember to check).
If you google 60036 steering knuckle you will see several folks selling them.
Possibly someone still has one and you would get the machine work done yourself.
or
Just go the GM/Jeep flat top knuckle route as suggested above and do the mill-drill-tap and add your own parts.
I would suggest you go with a tall steering arm if you do that for spring clearance.
Northwest Fab, WFO Concepts, Sky Manufacturing, OTT and several others have the tall arms.
Something like:
http://www.wfoconcepts.com/Uploads/Prod ... 24x768.jpg