well, not really, but since worlds are infinite, especially in the nether its technically infinite. However, what you are looking for is not possible anymore. I miss that too
As everyone is just saying pretty much the same thing, here goes. You can use an enderchest and take a ton of buckets to the nether and placem inside if you need amazing amounts of the liquid. You can also create an obsidian generator with one lava source and water and redstone if you are looking for obsidian, the only material you will need a lot of is redstone. Other than that, I don't believe there's another solution apart from a mod.
That's basically how every thread goes, complete overkill of the same answer, sometimes adding something about mods.
Long answer: What everyone else said, but still no. =p
TheSoVeryEpicSURGE
Now that's just rude!