508 Accessible Video/Audio Player

I'm in a real quandry. I need an audio player to be 508 accessible—independently accessible buttons using the keyboard where a user can tab through play, pause, volume, playback, etc. I've found players that'll do the trick but have trouble getting them to work in Lectora. Once I've gotten them to work within an html object, the keyboard focus is lost after I publish the course. Any suggestions would be great.