Are any of these servers what you are looking for?

Servers with "skullsaba" and "L4D2" in the name:
skullsaba.jp L4D2 Server #F3-04 (JPONLY)
skullsaba.jp L4D2 Server #F3-11 (JPONLY)
skullsaba.jp L4D2 Server #F3-06 (JPONLY)
skullsaba.jp L4D2 Server #F3-08 (JPONLY)
skullsaba.jp L4D2 Server #F3-05 (JPONLY)
skullsaba.jp L4D2 Server #F3-10 (JPONLY)
skullsaba.jp L4D2 Server #F3-12 (JPONLY)
skullsaba.jp L4D2 Server #F3-03 (JPONLY)
skullsaba.jp L4D2 Server #F3-17 (JPONLY)
skullsaba.jp L4D2 Server #F3-16 (JPONLY)

Servers on :
skullsaba.jp L4D2 Server #F1-05 (JPONLY)
skullsaba.jp L4D2 Server #F1-06 (JPONLY)
skullsaba.jp L4D2 Server #F1-07 (JPONLY)
skullsaba.jp L4D2 Server #F1-08 (JPONLY)
skullsaba.jp L4D2 Server #F1-09 (JPONLY)
skullsaba.jp L4D2 Server #F1-10 (JPONLY)
skullsaba.jp L4D2 Server #F1-11 (JPONLY)
skullsaba.jp L4D2 Server #F1-12 (JPONLY)
skullsaba.jp L4D2 Server #F1-13 (JPONLY)
skullsaba.jp L4D2 Server #F1-14 (JPONLY)
skullsaba.jp L4D2 Server #F1-15 (JPONLY)
skullsaba.jp L4D2 Server #F1-16 (JPONLY)
skullsaba.jp L4D2 Server #F1-17 (JPONLY)
skullsaba.jp L4D2 Server #F1-18 (JPONLY)
skullsaba.jp L4D2 Server #F1-19 (JPONLY)
skullsaba.jp L4D2 Server #F1-20 (JPONLY)
skullsaba.jp L4D2 Server #F1-21 (JPONLY)
skullsaba.jp L4D2 Server #F1-22 (JPONLY)
skullsaba.jp L4D2 Server #F3-01 (JPONLY)
skullsaba.jp L4D2 Server #F3-01 (JPONLY)
skullsaba.jp L4D2 Server #F3-02 (JPONLY)
skullsaba.jp L4D2 Server #F3-02 (JPONLY)
skullsaba.jp L4D2 Server #F3-03 (JPONLY)
skullsaba.jp L4D2 Server #F3-04 (JPONLY)
skullsaba.jp L4D2 Server #F3-05 (JPONLY)
skullsaba.jp L4D2 Server #F3-06 (JPONLY)
skullsaba.jp L4D2 Server #F3-07 (JPONLY)
skullsaba.jp L4D2 Server #F3-08 (JPONLY)
skullsaba.jp L4D2 Server #F3-09 (JPONLY)
skullsaba.jp L4D2 Server #F3-10 (JPONLY)
skullsaba.jp L4D2 Server #F3-11 (JPONLY)
skullsaba.jp L4D2 Server #F3-12 (JPONLY)
skullsaba.jp L4D2 Server #F3-13 (JPONLY)
skullsaba.jp L4D2 Server #F3-14 (JPONLY)
skullsaba.jp L4D2 Server #F3-15 (JPONLY)
skullsaba.jp L4D2 Server #F3-16 (JPONLY)
skullsaba.jp L4D2 Server #F3-17 (JPONLY)
skullsaba.jp L4D2 Server #F3-18 (JPONLY)
skullsaba.jp L4D2 Server #F3-19 (JPONLY)
skullsaba.jp L4D2 Server #F3-20 (JPONLY)
skullsaba.jp L4D2 Server #F3-21 (JPONLY)
skullsaba.jp L4D2 Server #F3-22 (JPONLY)