I just got a package of money from my brother in Uk .It has $5000 GBP which is about 10,000 Canadian dollars ,Cost us 10 bux to send it and this is a normal thing for us to do. I recommend you americans hook up with friends /family outside USA and get them to send you ‘registered mail documents ‘ 
.1.2 million cash has been exchanged between me and my brother this way in different currencies and we have never lost a single package although we did have a rogue american buyer who claimed to be short once.Fedex will open the packages so we use the mail systems except for large orders which we disclose the contents and paid insurance through airlines.
Yes there are risks to do this but I think when you weigh the alternatives you will see this as a viable alternative.We use to fly all over to physically buy the notes ,then we started’taking chances’ with the mail and couriers and we probably have saved $30,000 in travel expenses in past 16 months.
We have list of global couriers and mail sevice if anyone needs any recommendations .