That's a reputable seller who handled iMod / LOD / cables etc. for plenty of audiophile in Asia. He mentioned that's designed for USB DAC rather than using that OTG term since not everyone in China could figure out what OTG is.
Sometimes those Chinese sellers might know a bit of simple English so you could try to contact him via MSN (Skype at the moment) or e-mail (163.com) him
If that were no go at all, just do a search on eBay and Google for something like "Taobao agent" so that could help you to get something shipped to US
Or simply ask some forum members in China for a favor instead.
Other than that, how about making a deal with Brian and send him like whole bunch of right angle USB connectors for cheap. It ain't making much sense to import just a couple of connectors but it might be OK to get more for other cables in the future.
Finally, you could also talk to this forum member in Illinois regarding DIY cables for your specific needs