So there you go; everyone has listed their favourite chain (and least favourite) but the common theme is that you don’t need a SS specific chain.
I read a nice thought a year or two back that most R@D goes into chains meant for shifting therefore it was best to buy one of these instead of a more basic SS chain. It’s worked for me, and I’ve been riding and racing two different SS bikes for 2 years now using middle of the range KMC chains.
Because of the straight chainline of a SS setup, these chains are not really stressed, they are tested to forces that a rider is not going to get close to applying whilst riding.