The Roku Express is the only available new from Roku player with analog audio out. What I can't say for certain is if it will still send video out the HDMI with the audio out analog. However, I would expect it to work that way. Of course, it's only 1080, but so was your LT so I'm assuming that's fine for you.
Dan
Roku Stick (3600), Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.