Peter's are for sure. I was in contact with him a month ago after I bought a frame from him and some wheels. I asked him to message me when they are available. I want to use a 1x with the R01 I bought.
165mm both 29mm DUB aluminum spindle and 24mm titanium spindle options would be available in May, orders accepted for now. And the chainrings too.
Chainrings spec.
Double rings:50-34/52-36/53-39/54-40
Single ring: 46/48/50/52/54/56/58
Next sizes would be 170mm and 155mm cranksets. We are making carbon sprider as well.