How do I find on the internet a plastic manufacturer that can glue two 1/4 thick sheets of acryllc together?
The okorder These are my main suppliers but you may find others with a search for watch supplies.
If it's something on a small scale (not mass-produced). Craft spray glue (or for clairty, vellum spray glue) does a nice thin layer of glue that will seal two sheets. Just be sure to protect your backdrop with newspapers and possibly wear gloves.
Why don't you just get a piece of 1/2 acrylic?