My advice to my friend is the same as it would be for anyone similarly situated. Seeking friends and family for a company in need of $100,000 is the only way to start. To my friend's credit, he has done that and is half way to his goal. For the last $50K, he and I brainstormed about angels who don't necessarily have funds per se but are active and who have an interest in/passion for e-commerce deals. Finding such people can be akin to looking for a needle in a haystack. Frankly, that's where your lawyers, other service providers and friends who are plugged into the angel/venture capital ecosystem can be incredibly helpful. I also suggested that my friend use LinkedIn to find alumni of some successful companies in the e-commerce space i.e., Junglee, Amazon, et al. If you're an active LinkedIn user, it can be an incredibly powerful way to find people whom you want to meet.
Once my friend has some data and has confirmed that his idea has merit i.e., users, a model that is starting to show some color, going to super angels or venture capital firms with a penchant for early-stage e-commerce deals will be the right path forward. Just be sure to conduct diligence on everyone you take money from because you can bet your investors will be doing that on you.