phthora
Headphoneus Supremus
I’ve tried to look on Amazon, but can’t seem to easily find 2.5mm balanced two-pin.
Aliexpress is a good place to look for inexpensive cables. I have quite a few sourced from there, with the NiceHCK cables being my favorites. Most any cable you choose will have options you can select for the connections at both ends of the cable. The only drawback is lengthy shipping times.