Is this a sneeze guard?
What you are looking for is a bent acrylic sheet, may be sold as perspex or more common in the us Lucite which are just brand names of acrylic. Doing a google search for "bent acrylic sneeze guard" brought up a wealth of choices. Another term I've seen are Sneeze Screen. Ebay is a good place to start, others are Manhattan Display and Hubert.

These aren't hard to make with the right equipment, many acrylic supply shops will have an acrylic bender just for this sort of thing, you might be able to get them custom made to your spec locally.