Try to start making it yourself. Making a blacklist is pretty simple, but frowned upon in most channels (unless you own them of course, but you should consider what happens when two ops have each other on a blacklist, things get ugly fast).

Code:
/help bankmask
/help hash tables

I'm pretty sure you know how to make it yourself. A hostmask blacklist just replaces the 'if ($hget(blacklist,$nick)) { ban ban }' to a simple while loop, resembling somthing like:
Code:
  var %x = 1
  while ($hget(blacklist,%x).item) {
    var %v1 = $v1
    if (%v1 iswm $fulladdress) {
      ban ban
      return
    }
    inc %x
  }

Those who can, cannot. Those who cannot, can.