We just purchased a 2005 28-foot Prowler. Love it, except for one thing. This has a short RV-Queen sized bed. (60"x74", I believe.)The mattress is barely serviceable in comfort. We would love to add a mattress topper, possibly one with memory foam. But, where do you find such a pad? I have googled, but nothing worthwhile so far. Does anyone have suggestions for this?