[Cressi]

I've always found that you need to spend some to make some. You're going to need some clothes from the company you're SEing so you can bitch over the phone/email about them. Ex. holes or weird stains.

...which is a fine example of a good SE ^^

I don't agree about refund methods not being actual Social Engineering, but they do tend to work best and smoothest.

...but to the question.
I can vouch for it being possible to SE clothing companies and retailers through online stores, although it's tough. If you're interested; there are loads of guides on how to do this online, but they usually come at a small fee due to saturation ^^