I ran my balanced V4’s for years using a set of Kimber power cords. They were relatively inexpensive but were eventually discontinued because they weren’t UL certified. I tried a few other cords on them but stayed with the Kimbers anyway. Though I no longer have the V4’s I still use the cords. You might want to check with John Rutan at the Audio Connection as he is a Quicksilver dealer and still has some V4’s on his demo floor.
if I remember correctly the only other cords I liked on the V4’s were made by Tara Labs. Good Luck!