Just use short runs of the speaker wire you are using currently. The runs are so small that it really won't make any difference at all. Of all the things in your system, speaker wire makes the least difference. The gear is more important that what connects them by far. I have actually tested solid wire that was $3/ft. in my system and I can say that the cost just isn't buying you anything of use.
Let me just save you some time on interconnects as well. Get your analog interconnects from Bluejeans
I've used a lot of cables, some quite expensive, and I am currently using Bluejeans.
In both cases, the brunt of your funds are better spent elsewhere.