Yeh, I was gonna say if you can get hold of one of those 4-way 2.5mm jacks then I'd happily make you a cable loom, but I think what you've found there should do just fine.
If you're suspending cables anywhere then be sure to tape together any connections. Ten minutes before the start of a performance I was lighting for a local village theatre group I had a connector decide to dislodge itself above the audience and had to quickly shin up a step ladder and tape it all back together and get the projector to stop showing a nice blue screen with "NO SIGNAL" on to the curtains!
Do drop me a PM if you need any cables making up.