I was fortunate to find a .06 thick laminate made from recycled plastic at Home Depot to use as a counter top / work-surface material. This stuff is made for use in shower stalls, I applied it using a liquid nails product and then used a lightweight vinyl quarter round as an edge treatment. In the above photo, I've yet to install the back splash and trim.
I find it fun and challenging to source materials in alternate locations other than marine chandleries. I consider material weight in every decision. In the long run, when it comes to maintenance I think it will be nice to not depend upon having to have specialty materials and hardware to effect possible repairs.