[Elecraft] Baluns for KAT1

[Donn Kuse]

Need some suggestions and help.
My K1 has the KAT1 antenna tuner which I understand is for unbalanced
feedline.
My feedline from my 40m Inverted V is a balanced line, twin lead
feedline.  I'm not up to constructing my own, so what do you recommend
in the way of a commercially built one?  I understand from Elecraft it
needs to be a 1:4 balun which will change the balanced line to an
unbalaned one.  Thanks.
72,73 Donn, WB4ZWT
66 and still trying to learn