Replacement mattress for 195BH
Hey, just happened to read this thread when searching for mattress advice, and thought I'd post the best solution I found: IKEA!
By coincidence, an Ikea "Full" mattress is exactly 74.75"x53" (the same size as that factory "mattress"). For $179 we now have a very comfortable inner-spring mattress. They even have ones with memory foam toppers available, but it's awesome just as-is!