On Mon, 19 Jun 2006 21:17:43 +0100, "Dave Plowman (News)"
wrote:

It's actually for car headlights that are no longer available.

They're not cast, they're pressed. If you can achieve suitable surface
quality and accuracy with slumped glass (gravity presses it under its
own weight) then many hot-glass craft workers should be able to do
one-offs for you. Making the moulds isn't especially hard either. Try
asking in rec,crafts.glass.