It is important to note that these runewords are empowered versions of existing runewords, they're not "brand new runewords". Basically, runewords that use vanilla runes (zod and below) will have a level 121 version. So far only the
weapon runewords have been implemented, and these 60 new will be the ones that correspond to armor.
They might make it into single player at some point in the future, but certainly not before sigma. This is because they are meant to be level 121 and single player MXL will stay at level 120 until sigma. Why? Because there is no way to limit the experience ancients give without using custom dlls. So levels 121-125 become pointless if you abuse ancients quest. This is something that can be fixed on realms but not on SP because it breaks mac compatibility, it also breaks compatibility with patches that are not 1.13c, so yeah, it's a bit problematic.