It's probably not much help, but I'm not sure that Olight made any S1A in neutral white. I had to swap in my own XM-L2 5C2 in my copper S1A to warm it up a bit, would've bought one that way if it were available. I made an album of some of what I did to make it happen, available here, if you're interested in doing the swap yourself if you can find a S1A. Good luck.
They exist for sure. I have one. They announced the release of them very late in 2016. I bought mine in February 2017 and by the summer they were hard to find. I don’t think they made very many and I’m almost certain all of them are black aluminum, no special colors or metals.
I would by another tomorrow if they were still available. I hope you find one.