Sounds like you are in need of a wire stretcher. After cutting or receiving a wire that is not of sufficient length, the stretcher can be used to make it longer. As an electrician we are often in need of a wire stretcher. The apprentices can never seem to find one when they are sent to get it. Our local hardware store usually has a blowout sale on tools such as this on April 1 every year.
I like to keep my wire stretcher right next to the box of map grid squares I have for putting on my charts.
Good luck with your new rigging.
Good to know there's no shortage of A$#%ole makers in central california.