Basic Site using OsCommerce

Looking for developer to make a basic ecommerce website using OsCommerce. Business is selling frozen coffee online. Key difficulty is making sure all orders can calculate UPS shipping cost immediately. If location is out of UPS ground 3-day range from San Jose, CA, then the order must be upgraded to UPS 3-day shipping. Want the to allow customer to add zip code in cart to calculate shipping cost before proceeding to checkout. Also, will need some design adjustment to fit OsCommerce. Currently, the site is www.leescoffee.com.