Do you think you could combine Goblin Town Terrain with the old Mines of Moria set and that could be set pretty much anywhere dwarfy/gobliny (with the exception of Balin's tomb)

You could but then the purists would point out that Moria was a lot further south and that Tolkien had never mentioned any dwarven mines in the northern part of the Misty Mountains.
If you are l;ooking for an expansion of your Goblin Town, I like what Barbar has done in his terrain thread, though you could get a more flexible solution by making individual sections from balsa, strong thread, matchsticks and fine strips of wood like those you can get in hardware stores (online or physical) - for example B&Q do a variety of 6mm thickness in a variety of cross-sections with a length of 91.2 cm (3 feet in old reckoning). Make it look rickety and style it along the lines of what you see in the film/movie books/Rulebook. That's what I plan to do. When my dratted boxset arrives...

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Published ebooks:
Instrument of the Empire
A Note of Defiance
Phantom Ships, Ghost Flotilla
More to come!

Gundabad, up north, was a dwarven colony by all accounts, and there's a better than average chance that Goblin town itself was probably some small abandoned Dwarven outpost before the wrong sorts moved in.

Also, since other Dwarven colonies were captured and fought over in the long centuries before the restoration of Erebor, I can easily imagine Moria type pillars with wooden planking slung between them

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Dreaming of getting back to painting...any month now.

Yeah, I mean Goblin Town is just a bunch of wooden planks and could easily be in moria. Like that scene where Gandalf talks about Mithrill Mining in the extended version.

whatever you can imagine fella.

Sounds very good.

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"... Telchar wrought it in the deeps of time."
-On Andùril, The Lord of the Rings