How can you ever do any business with that web site. Things keep popping up. There is no end to that.
I would not do even $0.02 worth of business with them. They don't want it. If they did, they would have a decent web site.
As far as I can see, that is nothing but a straight power cord, with standard connectors on both ends. You need to look at electric/electronic catalogs to find the connectors. But I suspect that you would wind up paying as much or more that way because the price I saw under the pop-ups was quite reasonable.