Unfortunately, you may be caught in the Cost vs Worth issue. Not saying this is happening for you, but I know it happens in my line of business.
Example: Say a person out of the USA calls for 2 sideplates. Of that sale the vender actually makes $2.50 each = $5. profit. Cost to the vender is 2 hrs labor which includes a trip to the PO & filling out export forms. Now, some people can walk right in a PO & do their thing & leave. For others they may stand in line for a hour & drive 30 min one way to get there. For $5. So if this vender does 4 exports that day, he made $20-30. it cost him more for that one persons salary & overhead than profit. Plus what work that person should have been doing, has not been done. So basically it cost him double that persons salary & overhead to do that day in exporting. Yes, I know you can set it up to do everything on line & etc. Some don't like doing that, they want to do it In Hand, By Hand, etc. It IS their business. Now, some say that is just part of doing business. I say it is part of doing business IF that business owner want to incur the cost of the Export.
I think the best way for you to get your part is to have a friend or relative in the USA ship the part to you.
I have owned a small business for 30 years. We don't sell or ship export. Period. Cost & time involved way exceeds the profit. It is a Business, not friends & family. We have to Make Money to survive.
Years ago shipping anything export was no big deal. ANYTHING you ship today is a Big Deal. They make it a Big Deal. They get paid for making it a Big Deal. Heck, Some even call it progress.