Have you tried looking for the product overseas?
A good place to do business with is Masters Marketing in the UK. You might have to email them with the name of the product to find out if they can get it for you as stuff is often marketed under a different name in England. They will translate the US brand name into the UK brand name.
If it is a generic product it might be listed on their website.
You can order virtually any RX as long as it is not a controlled substance.
Masters Marketing doesn’t require a prescription?