There's a few discontinued repro back glass made over the years by various vendors still out there, as well as plexiglass repros and original used/NOS OEM glass, generally the repro rear glass is laminated safety glass, not tempered as OEM, however AMD has recently tooled/developed OEM tempered glass and stainless moldings for the Daytona and Superbird, I haven't seen them as yet, nor know of any release date

Mike