Sounds like your VIsconti experience echos my worst fears. I hadn’t considered the porous nature of the material being an issue for absorbing ink but that would also annoy me greatly. Thanks for the feedback.
In terms of overseas suppliers. Ordering from Amazon Japan was no different to Amazon US or UK. I didn’t even need a to create a new account. When buying from Amazon I normally ensure the seller is Amazon itself rather than a third party to avoid fakes although apparently this isn’t foolproof as Amazon sometimes mixes their own stock with that of third parties (see a recent Pilot Metro post). Cult Pens have been excellent and I’ve use them several times. They left a Lamy nib out of one order I placed but quickly expedited it to me when I contacted them to report it was missing. Their prices are good and you can get free shipping if you spend enough. I’ve also used The Pen Company for one order and they were great. I’ve heard good things about Pensachi but have not personally used them.