All this talk recently about balanced cables has me reaching for my wallet again....
I really want balanced cables for my Pono to feed my K10's, but there are only two options I can find with a modular system to switch out the source end. Silver Dragon and DHC offerings. I think the hybrid copper and silver Symbiote Fusion V2 would be a nice option, but their website says 12 week lead time... 12 weeks!
Norne Audio Vorpal is also hybrid copper and silver with a modular system, but no option for Pono dual 3.5mm balanced... Think they would make a custom adapter for me? Their price seems more reasonable than DHC also.
Also, check with Ted at Ted's Headphone Lounge. He might be able to set you up. Very reasonable prices, good quality, and relatively fast turnarounds.