Ray, you’re the man. I was literally on my way out (had been in both buildings asking around) and saw the 苹果医院 sign. Went and checked it out and the guy said he could hook it up. Gave him the info, the cash, and will go back tomorrow to see the verdict. Will update then.
The cash ended up being a tidy sum of 350 kuai. To unlock an iPhone4 a year or so ago was around the same price. Dunno if I got taken both times or if it’s just a pricey procedure. Regardless, it’s a hell of a lot cheaper than paying out of contract.