Reply to "For a standard gauge layout: What is an ideal/economic noise reducer between a wood table surface and 3/4 inch thick maple plywood sheet"

Johnson rubber roadbed is available on the secondary market. I have some extra 072 and 084 circles plus a good number of straights at my other home, but it is not available to sell at this time. The advantages are its easy drop-in design, slip resistant surface, and noise abatement quality. I use it directly on an office tabletop surface with excellent results. Will have my extra curves and straights for sale in the next couple of months. The color is black.