Did you know, USA Girl Scouts also operates an online store out of the Camp Zama location in Japan? They have a huge selection of items (but not everything) from the USA store, some items are even less expensive, and shipping is likely cheaper for small orders.
There is a full catalog of items, part numbers and prices available on a special Girl Scout Store Overseas Pintrest site. (Note, you'll need to create a Pintrest account to see the full catalog details.)
It is not a full e-commerce site, so you simply browse the catalog, fill out an order form and email it to the store for a final invoice (which includes shipping charges). Payments are made using a PayPal account or credit card (via PayPal with no account login required).
More details, order forms and phone and email contact info are on the USAGSO website.