I just got a new (well...new to me) bass and it had Sheehan rotosound string on it....I like the grind and clarity of the strings.... I want to try a set on another bass...BUT the problem is that (other than the lakland HoBo I just purchased) all I have are 5 string basses. I did some research and found out that Sheehan rotosound strings only come in 4 string sets. Question 1: Does Rotosound sell individual strings? Question 2: If so, what B would you recommend to compliment the other 4 strings? thanks for the input!