I was trying to find the proper cable to take XLR to the mini plug on the Epic X before a interview shoot this week. I got some help from a man wise with Red knowledge, (he can come forth if he wants to) and he loaned me these cables which worked great. I shot a photo of the front and back so you could see the package. The best thing is this is a part that could be ordered almost anywhere with the part number. The package has a pinout diagram which might be helpful to the handy types. I think this is on the appendix of the Epic Op manual also.
The Epic has a unbalanced mic input so I had to drop my Sound Devices 302 down to Mic level which is a journey into that mixer's menu system which is a series of flashing LED's. Once I had the mixer set to mic out I just adjusted the Epic sound inputs to get the VU meter looking similar to RED One which was all green and just a bit of yellow showing (using the 1k tone generator). I had to call Sound Devices tech support because we were about to ship the gear out and I was in a rush, I have never changed the output and the instructions are not that clear, the SD support was awesome. Never learn anything as well as you do under pressure!
After I do this run & gun job on Wednesday I have more info on how it sounds, but I know I was getting good levels in my quick cable test. We tried a similar cable made for one of the still type/motion cameras and it didn't work at all. It was wired wrong. It looks right but it didn't work.