There are a few places that sell the female XLR to female XLR, I got this one last year:Tutorial on How to Use Your Standard Headphone Cables with Raal SR1a
The example will be Norne Silvergarde S3 pure silver OCC litz with 3.5 mm TRS connector.
Hifiman chose to pinout tip as positive and ring+sleeve as ground.
Raal chose 3.5 mm TRRS with tip/ring1 positive, ring2/sleeve as ground. This means I needed to desolder the wire from ring on Hifiman TRS connector; otherwise, it (ground) would short Raal's ring1 (positive). Relatively simple to do as seen below.
0408201341 by drjlo2, on Flickr
Then I needed to make 4-pin female XLR to 4-pin female XLR adapter, since nobody sells such a thing.
I made one using OCC copper wire with enamel coating, making sure to observe the diagram in post above.
0408201502 by drjlo2, on Flickr
Hifiman cable's 3.5 mm TRS clicks right into Raal's 3.5 mm TRRS jack perfectly, and the end result is Glorious!!
0408201507 by drjlo2, on Flickr
Works pretty well for those who aren't too handy with making their own cables.