Shouldn't take that much searching to find the relevant info, but all longhaul planes except one (LN-RKP) has the "new" cabin.
SK claims LN-RKP is just a back up plane, however it tends to fly regularly. It's flying today and was yesterday as well, but had 4 days still before then....
LN-RKP have previoulsy made it to NRT, but I believe it's pretty rare.