More Current Single Ended Interconnect Cables Closest To AudioQuest Niagara's?

I have a pair of AudioQuest Niagara interconnect cables that are, in my system, simply outstanding. They replaced three other quality cables of that ear (5-6 years back) and completely outperformed them, again, in MY system. 

I am in need of another pair (i meter) due to changes in positioning etc. and these simply never appear for sale on the used market. Few people even seem to know they exist, knowing the name Niagara from AudioQuest's later line of power conditioners. 

I know there are, among other's with expertise, dealers that frequent this forum. I hoping that one of them, or someone else, equally informed on this topic, could tell me what more current and available AudioQuest cable, within at least semi-reasonable pricing, as the Niagara was,  would be closest in characteristics and performance to my Niagara's? Any assistance greatly appreciated. Thanks.