"...right."
Sofia looks kind of conflicted. She doesn't want to accuse the nice, seemingly very open person of lying. Certainly the outfit she's wearing is quite something, which supports her story of being some wholly new phenomenon. But the Empire has plenty of human enemies who would cheerfully lie - although to what end, she's not sure. 'Wasting a bit of weirwood on a wild goose chase' seems like a rather odd objective.
Well, she can introduce her to some people, not directly vouch for her, and see what proof she digs up when they ask for it. Wasting the time of a few shipwrights on what is at least an interesting tale is hardly the worst outcome. Mariello is going to want considerable payment for delivering this, but she can probably just get someone to enchant all the Shantelle herb gardens, and it will be good for everyone.
"So, shipwrights. This is rather a tradeoff of secrecy and effectiveness. The Ezmara enclave in Siroc is where I would normally go for this kind of thing; they are very keen on experimental designs and probably already put together plans for something that was too tall to be practical. But there is a Grendel fleet anchored just off Siroc, and they seem to think we would like to trade with them, so the streets of Siroc are likely infested with Grendel merchants. Nobody will be being particularly open with them, but we would want to disguise you better, at the very least.
There are plenty of fine shipwrights in Atalaya, and fewer Grendel, although a few of them may have come ashore here as well; but they are, by and large, traditionalists, which is good for getting ordinary things done, but not so good for speculative work.
Or I suppose we could journey to Sarvos. Sarvos was sacked by the Grendel and I'm fairly sure any that dare set foot in that port would be robbed naked by mountebanks before they had left their boats, treaty or no treaty; after all, we would clearly pursue the common criminals that did such a thing, what can you expect in a city of the League, and so on. I have fewer contacts there, and they do not intrinsically respect my position, but 'a life of divine luxury and plenty' is likely to be quite a popular selling point.
If we are going there, I would want to ask around in Atalaya before we headed out, for someone who knows the League better than I do; a lot of friendships were forged in the recent raid on a citadel of slavers, so it shouldn't be hard to find someone trustworthy who can make useful introductions."