The Legion would be the only SAO 229. In .357/.40 no. If they did they would be rarer then hens teeth. I could wrong and hope I am cause I’d like to have one. As for the frames, the 9,.357,.40 are made of the same alloy. Not sure if they are dimensionally the same. Probably not and the locking mechanism is for sure not the same. I wonder if it would be easier to just convert a P229 .357/.40 to SAO. I’m betting the frame would require some machining.