I just ordered some D'Addario Baritone strings from Music123, but they have not come in yet. They are 0.016" to 0.070". Music123 also sells GHS Baritone Strings, which are 0.014" to 0.070". I normally use Elixir light gauge strings for standard tuning, and their "B" string is 0.016", so these would seem to allow B-to-B tuning on a guitar with a normal scale length at a tension similar to light gauge strings. I know that Tacoma's Thunderhawk baritones use D'Addario strings with a 29" scale length, so they must be tuned to a much greater tension to achieve "B-to-B" baritone tuning. After realizing that, I have thought of just getting a jumbo-sized guitar and stringing it with baritone strings.