DEX210: Full Metal Diff Spring Nuts?

[Origineelreclamebord]

Has anyone found a diff spring nut that fits the DEX210 and is entirely from metal?

The thing is, I need a lower profile diff nut (3.5-4mm instead of 5mm), but the kit diff spring nut is plastic at the side of the lugs, and at the inside is only 2-2.5mm of thread from a brass inserted nut. Modifying it at either side will probably compromise durability (a lot).

The measurements of the 210 diff spring nut are:

PS: Before anyone starts a rant about the quality of Durango's diffs, THIS HAS NOTHING TO DO WITH ISSUES WITH THE STANDARD DIFF. It is for a custom built car - My driveshafts are positioned differently (deeper into the outdrive) and as such the standard parts don't work.