Working on a design of a six string bass tuned like a guitar (down an octave of course) but can not locate any string that could accomodate tuning to a high "E". I currently use Obligatos on my 5 string bass with the High C tuned down to a B so I am just one string away! It wouls be rough to try to take the Hogh "C" up to an "E". I have looked at gamba strings but they are too short and/or gut. Any recomendations on someone/company that may do custom string work? Thanks.