For issues starting from Volume 19 up to the present, you can order a PDF version to be delivered to you instantly for just $2.50.
Here's how that works:
Go to the issue you would like to order from our past issues.
Once you've found the issue you would like, just select the first item in the pull-down menu labeled "Delivery Type."
You can't miss it -- it's the first option.
Otherwise, we can send you a single-copy print version via first-class mail, no matter where you are in the world, but if you are living outside the continental U.S., a PDF makes good economic sense as well as giving you that good 'ole instant gratification.