How big do you need the macro table to be? You can get acrylic in various thickness, the thinner material like 3mm could be forced into a curve if fixed at both ends. that should be ok for smaller items.
Bending thicker material to a curve is not so easy as a large area needs to be evenly heated.
Where I am in the UK there is a plastics fabricator near that can make customised items (and I can sometimes get useful bits of material from their scrap bin)