Warm winter boots?

Throw this one out to the cold water surfers !!! My toes are getting cold again already and winter hasn't even started yet! Used to have 5mm Quicksilver boots.....got cold toes! Recently bought C-skins 5 mm boots ....getting cold toes! Does anyone own a pair of boots that actually keep their toes warm? Have seen some 8mm boots but thinking might not feel the board so well with that thickness of sole!
Surf the west coast of Norway so sea temp getting down to about 4-5 degrees C.
Any recommendations?
MSL
Surf the west coast of Norway so sea temp getting down to about 4-5 degrees C.
Any recommendations?
MSL