Actually it was probably a bad idea of me to say there was a hint there as I almost certainly just distracted you.
Gold is very bulky to move- terrible stuff to break blockades in in bulk with the small ships you would use for that. It's why smugglers like gems- very small and light for their value; you can carry enough in a small ship to make a fortune.
You doubt that Kazan really had much access to precious materials though. In all honesty, it's probably untraceable how he paid the smugglers. Maybe they owed him before it even started. It'll be lost to history (and even if you did trace how he paid them, it wouldn't actually help that much in telling you where the smugglers went afterwards)
There is certainly nothing that jumps out at you from the text gibberish referring to anyone leaving the planet.
There's only thing you know must exist somewhere- Kazan didn't contact the smugglers via telepathy. At some point, somehow, he must have instructed them what to do and that would have been via his base systems.
Nice try on the Thalos link btw- but Adelmo is looking for a way to deal with that issue, not for more information on it. She wants the scrolls for their purported Syphar n Kalar info.