Why not shop for a US supply? Is your market price point really so low that no one locally can make these? In my area stainless channel letters are top shelf items. Shops fight for this work, but no one cuts prices below Gemini levels.
So either your market is so disturbing that premium work goes for plastic prices, or you're trying to grab the absolute most $ out of a job at any expense.
I dunno, but if I were buying signages, it's a sure thing that I'd want the Dutch management mentality for the crew that reads my mind about great looking signages.
And that is the difference between Thailand and China.. there's no plural in Chinese. Now to go have a dozen donut.
In all seriousness tho.. if it's a large order look into the cost of freight insurance, shipping, customs fees (metal products can have a high tariff), and never ever buy on any terms like INCO ex works, or fob manufacture, or without an escrow account or forwarding agent.
Unless you're experienced in imports you can get screwed.
its only a freaking
sign!