Why not order the HD25-13 OFC cable from overseas and when it arrives modify it so it terminates to a 1/8" end and shorten it to your needs - this is what I plan to do, but I must find a reliable source for the HD25-13 cable that will ship here without gouging too much. The difference between the steel and OFC cable is more noticeable than any headphone cable swap I’ve ever heard – even with a portable source serving lossy MP3s with no amp the improvement is more than subtle. Since I also use my HD25-1 when I need isolation in the home environment, and there it is driven by the DAC1 serving lossless files, the improvement is much more evident (therefore making the upgrade cable a necessity in my opinion). I’m currently using my HD25-1 with the HD650 OFC cable, as I tried the HD600 cable, and though it fit nicely in the grooves, the plugs would not remain seated; the HD650 cable had the reverse problem: the plugs fit very snugly, but the cable itself is too thick to fit in the groove and forces my to use the headphones in a dual-sided approach. While the stock HD25-1 cable is more convenient, the sound quality upgrade of the OFC cables is just too large to ignore, and thus I live with slightly less convenience but better sound – soon I shall have both, however (for a nice fee, of course).