Forget the non wine shipments. Need to find an importer who will receive the shipment , and release it to you. US citizens may import , for personal use , a certain amount. How much , I do not recall. Bottles would probably be required to have US health warnings. i.e. unless for personal use. This is a FDA requirement.
expecting women , sulfates etc.... It all depends on the importer in the US. For a fee , they will consolidate and , if it helps fill a container , and at what cost , will help if you know them. US importers are trying to make a buck , so , again , contacts , contacts....
Talk to your cousin , he is more familiar with export laws here. I have brought many cases of wine from Italy , with no problem. But it seems to me if you can find the US importer , and the ARG exporter , and it is not too much , it can be done.
One of my previous business was a wine importer to the US. I am not 100% sure of ARg export regs... Now that Christina is reina.....