I have purchased cables and adapters from Monoprice since 2006 when PS3 came out and just saw today that they are selling the same adapter similar to Samsung official and MHL's own Micro USB to HDMI adapter for 15.92 plus tax, S&H. I am 2 states away from their hq but with standard shipping, the last piece I ordered was on my doorstep 2 days later. Thought I would recommend and help save a few bucks.
For only $13.51 each when QTY 50+ purchased - Micro USB to HDMI MHL Adapter - Black | MHL Adapters
Edit: and nevermind the qty purchase message in the link, when you buy from them in bulk, the price drops.
For only $13.51 each when QTY 50+ purchased - Micro USB to HDMI MHL Adapter - Black | MHL Adapters
Edit: and nevermind the qty purchase message in the link, when you buy from them in bulk, the price drops.