Ooooh, I hadn't seen those. I smell a custom power cable in my near future.
I tend to use pretty generic stuff in my power cables, usually sourced from the local big box store. I'll have to look more closely at the VH audio stuff and Neotech for my current project which will have a 10A heater.
[edit]scratch Neotech off my list, any company that makes bulk cable that costs $300 a foot is bonkers.