For Prime members only, Amazon offers the Myojo Ippeichan Yakisoba 4.8-oz. Japanese Style Instant Noodles 6-Pack for $11.58. Check out via Subscribe & Save to cut that to $11. With free shipping, that's around $7 less than you'd pay in local stores. Each pack includes a pack of spicy soy sauce and mustard mayonnaise.
Be sure to cancel your subscription once your order ships to avoid being billed for further shipments.