I use whatever i have on hand, another dpn, crochet hook, pencil, darning needle, straw, ect.....whatever will hold the stitches for a min....if i use a cable needle at all. I actually do have a cable needle, its a metal horseshoe shape. I love it, you can put the stitches on the cable needle and just let it hang. The straight ones with a little groove in them....not so much.
When you get REAL brave, (and you have the right yarn) you can cable without a cable needle.
This is awesome that your cabling!!