Clear sneeze/spit guards, screen, made from crystal clear 3mm thick PETG.  From only £49.99 each.
 
Over size is 830mm wide x 730mm high x 325mm deep
Pass through opening is 350mm wide x 160mm high.
 
Available in discounted packs of 4, all you need to do is slide the two supplied feet into place and you are ready to go. Can have branding printed on them on price request.