I have seen 6 string Bass guitars 36" scale , I agree a C string is just like the E-A-D-G it can be 34" scale or shorter Fender jag, anyway true there are good and bad sounding strings and scaled Basses, with good strings and Bass 35" scale B string feels and sounds better that's why they make 35" scale 5 string BassesHuh? Why would you say that a 6 string needs more scale than a 5? Unless you are assuming that a 6 string would be strung F#-B-E-A-D-G, that makes no sense at all. Adding a High C string is no reason to need a 36" scale.
Ibanez has gone fanned frets with their SRFF805, from 34" on the high g-string and 35,5" on the low B! PERIOD! And all of them are available right now :