Clearwater Displays is a manufacturer and distributor of acrylic display cases for all your collectibles including die cast vehicles, models, cars, trucks and sports memorabilia
They say:
Clearwater displays are designed & developed by plastics process specialists with over 15 years experience in the Polymers industry. At Clearwater Displays our aim is serve the collector for all their display needs. All of our products are made to precise specifications to ensure that the "built in quality" appearance shows through time after time. All of our standard cases are made from clear acrylic with mirrored backs and they come with free mounting hardware.