While normal retailers play catch up, eBay is blazing a trail of various USB-C cables/adapters.
http://www.ebay.com/sch/i.html?_odk...3.TR0.TRC0.H0.XUSB-C.TRS0&_nkw=USB-C&_sacat=0
The mythical USB-C to mini DisplayPort cable
http://www.ebay.com/itm/USB-C-USB-3...700?pt=LH_DefaultDomain_0&hash=item3cf8b3b174
http://www.ebay.com/sch/i.html?_odk...3.TR0.TRC0.H0.XUSB-C.TRS0&_nkw=USB-C&_sacat=0
The mythical USB-C to mini DisplayPort cable
http://www.ebay.com/itm/USB-C-USB-3...700?pt=LH_DefaultDomain_0&hash=item3cf8b3b174