The resorts offer extensive resort-wear boutiques and art gallery options.  In addition, Kailua-Kona offers food shopping alternatives (Costco, Safeway, KTA, etc.) as well as local shops that offer lauhala, traditional wood calabashes, and coffee plantations selling their own specialty and "estate" blends. 

Duty-free shops, Macy's (with local wear), restaurants, Activities' Desks, art galleries presenting some of Hawaii's foremost artists, and souvenir shops. 

http://www.waikoloabeachresort.com/shops.php

This upscale shopping open air plaza offers fine dining (Ruth's Chris Steakhouse, Tommy Bahama's Tropical Cafe, and Dara's Authentic Thai Cuisine), resort clothing boutiques, Lahaina Gallery and other specialty stores. 

Starbucks, for your caffeine fix, is located near a soon-to-be-opened Gourmet Grocery store. 

http://www.shopsatmaunalani.com/index.html