I was looking on ebay for some of these. There are some Japanese sellers selling these shirts in the $90-$120 range (apiece). And then there are some Indonesian sellers selling them for like $17-$21, but I'm guessing those ones aren't licensed/legit. The ones being sold from Japan all have "GUNS N' ROSES" printed on the inside neck area of the shirt (no tag), whereas the ones from Indonesia are your run of the mill Gildan shirts with tags. The printed designs appear to be smaller & less vibrant as well.
Really wish GNR would offer these shirts in the online shop at some point. They're awesome.
Yes, those Indonesian ones are definitely not official. They have been doing it with US shirts and now with the NZ and Australia shirts too.