mouser.com is by far the best.
However. if he plans on buying 1 or 2 of each, then he might not want to attempt this, as all online stores like these have high shipping rates. buying bulk makes more since.
No Handling Fees
Orders shipped via International Global Mail, UPS Worldwide Express or FedEx International Priority are not charged any handling fees.
International orders are normally shipped complete. If any item must be back ordered, the order will be held until all items can be shipped together. However, if you want to ship items that are in stock immediately and ship back ordered items when they arrive, please state that multiple shipments are acceptable in the "Order Comments" section during the checkout process.