We have enhanced our PayPal IPN interface to capture "fulfillment address". If a buyer makes a purchase and specifies a forwarding address in the US, your Teapplix order will show this address instead.
This feature is enabled on October 18, 2012. Orders before that date will not have this fulfillment address. Note that this feature is only available if you use PayPal Instant Payment Notifcation Integration to Teapplix.