If the reason you want it is for actually playing with it, don't bother farming it. If you're really lacking on weapon stats, ask someone to craft you a hq weapon of correct level. As of the moment, crafting any pre 50 stuff for level 60 crafters is easy enough and most of the time, costs peanuts. Yes, crafted hq doesn't have as good stats as pink one without melding, what then, you'll use it for abiut 5 levels at most before you need new one.