According to Sony the remote for that set is the RM-Y190 though most any Sony Remote will work for the basic functions at least, they were the same for years.
Lots of them on eBay
http://www.ebay.com/sch/i.html?_from...-Y190&_sacat=0
It's likely that certain functions are only accessible with the remote, the higher end sets had more functions than could be put on the front panel.
Sony's support site is here:
http://esupport.sony.com/US/p/model-...7752#/howtoTab
I would just get an older BD player or Roku with analog outputs, there are HDMI to analog audio converters available but sometimes such things can introduce lag in the sound and cause lip sync problems.
There might be an older model BD player with streaming video built in but my experience is that the user interface on those is inferior to the Roku.
This Might be worth a try for $35, Amazon will take it back if it doesn't work right, you would need one for each device however, or an HDMI switch.
http://www.amazon.com/ViewHD-Premium...udio+converter