I know this is an old thread but.....they do make tenor guitar strings. I have something that some people think is a baritone ukelele, but I think is a small tenor. I got some tenor guitar strings, and they're CGDA, but I've heard some people tune it to GDAE like a mandolin. Nonetheless CGDA is played the same as a mandolin as far as fingering goes. It's also how violas are tuned.