Can't answer your question, but it sure gave me a great idea. My 2016 Greyhawk 31DS has a hard board (upholstered) screwed onto the front of the jackknife sofa. I removed it to open up all the space for shoes, ceramic space heater, fan. But stuff gets tangled and cluttered under there. Now I am going looking for a similar sized under bed storage container which are about this size.
Didn't know they started making a drawer for it....awesome.