Gloria Audio in Neihu - I visited them 4 or 5 years ago because they had an IDA-16. It was a very awkward visit. I had the impression they weren't used to 老外 paying them a visit out of the blue. It took a good 20 minutes, but they did hook one up to a pair of unfamiliar speakers and played a couple of unfamiliar songs for me.
Their website doesn't have the WA-300 yet, but the 'sneak peek' is interesting.