If they're charging £2000, I'd suggest avoiding it as that's an insane mark up on what you'd pay if you were to visit them in Seoul. Over a 100% mark up.
Also, I'd definitely want to see the head cutter. Except for liking a strong taper on the trousers, he'd at least make sure you were getting your moneys worth. He's a classy guy and wouldn't allow anything to go out that he wasn't satisfied with.
However, with an overseas operation without direct involvement, it'd be easy to half-arse it. It comes down to that face saving thing. If there's direct accountability, then they'll be real sticklers for details. If someone else can be blamed and there's no risk of losing face, well I'd worry about them thinking "fuck it" and you've overpaid for something that they themselves would consider sub-standard anyway.
I'm nearing the magic Foo number of commissions with them and am pretty satisfied with the product. Take what I say with a grain of salt, but if you want to know more just let me know and I'd be happy to answer any questions.