For what your after - i.e., a guitar with ten individual strings - you are going to have to look at a custom instrument. There is just nothing like enough demand for it to be a mass produced product. There are a lot of good custom builders out there, but you are looking at some serious money to get something like that made. The LOWEST you are likely to find is going to be at least $3000, and even that is a very conservative estimate. Also, it is going to be a real bear to try and play. The stretch to those low strings will be extreme. While there have been a fair number of classical guitarists who have used guitars with as many as 12 (and maybe up to 16, but I don't remember) individual strings, the higher tension of a steel string guitar kind of scares me when I think of having that many strings.
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