Maybe ask this guy?
Murloc Gunner
Hasn't been active on the site since 2011 though: seruk
You could try his Skype. His account is written on his information tab.
Technically:Last active 2008, I highly doubt it.
Hopefuly not, and maybe the murloc god already has it xD, since I'm in the murloc cult, thx strasz(assuming it's not protected or anything)
Sadly ive never seen that one before so no i dont have it - even if it was a m3 file i still cant convert m3 to mdx files yet - only blp to dds files current can i do.
Ive never seen it in sc2 either though i could have missed it already - il look into it
If you're referring from outside Hiveworkshop:If you can, please do, and if you find any other custom murloc models send me + rep hihi.
If all else fails you could request someone to put a murloc near the gun of one of these models:
Goblin Mobile Turret
Goblin Tinker Turret Artillery
Goblin Tinker Turret Cannon
Goblin Tinker Turret Flamethrower
Turret
If you're referring from outside Hiveworkshop:
Murloc Golem
Murloc House
Murloc Hall