After trying a few different adapters from amazon with limited success I ordered the Gang-Hu adapter that slingbox recommends. I have yet to receive any shipping or tracking information. My order number is 2016062400005.
This adapter does not worked for me at all. Replaced this with HDFury2, now enjoying HD quality from component (YPbPr) inputs from HD source. Do not be surprised once you get yours adapter and it does not work.